UniProt ID | PHF8_HUMAN | |
---|---|---|
UniProt AC | Q9UPP1 | |
Protein Name | Histone lysine demethylase PHF8 | |
Gene Name | PHF8 | |
Organism | Homo sapiens (Human). | |
Sequence Length | 1060 | |
Subcellular Localization | Nucleus. Nucleus, nucleolus. Recruited to H3K4me3 sites on chromatin during interphase. Dissociates from chromatin when cells enter mitosis. | |
Protein Description | Histone lysine demethylase with selectivity for the di- and monomethyl states that plays a key role cell cycle progression, rDNA transcription and brain development. Demethylates mono- and dimethylated histone H3 'Lys-9' residue (H3K9Me1 and H3K9Me2), dimethylated H3 'Lys-27' (H3K27Me2) and monomethylated histone H4 'Lys-20' residue (H4K20Me1). Acts as a transcription activator as H3K9Me1, H3K9Me2, H3K27Me2 and H4K20Me1 are epigenetic repressive marks. Involved in cell cycle progression by being required to control G1-S transition. Acts as a coactivator of rDNA transcription, by activating polymerase I (pol I) mediated transcription of rRNA genes. Required for brain development, probably by regulating expression of neuron-specific genes. Only has activity toward H4K20Me1 when nucleosome is used as a substrate and when not histone octamer is used as substrate. May also have weak activity toward dimethylated H3 'Lys-36' (H3K36Me2), however, the relevance of this result remains unsure in vivo. Specifically binds trimethylated 'Lys-4' of histone H3 (H3K4me3), affecting histone demethylase specificity: has weak activity toward H3K9Me2 in absence of H3K4me3, while it has high activity toward H3K9me2 when binding H3K4me3.. | |
Protein Sequence | MNRSRAIVQRGRVLPPPAPLDTTNLAGRRTLQGRAKMASVPVYCLCRLPYDVTRFMIECDMCQDWFHGSCVGVEEEKAADIDLYHCPNCEVLHGPSIMKKRRGSSKGHDTHKGKPVKTGSPTFVRELRSRTFDSSDEVILKPTGNQLTVEFLEENSFSVPILVLKKDGLGMTLPSPSFTVRDVEHYVGSDKEIDVIDVTRQADCKMKLGDFVKYYYSGKREKVLNVISLEFSDTRLSNLVETPKIVRKLSWVENLWPEECVFERPNVQKYCLMSVRDSYTDFHIDFGGTSVWYHVLKGEKIFYLIRPTNANLTLFECWSSSSNQNEMFFGDQVDKCYKCSVKQGQTLFIPTGWIHAVLTPVDCLAFGGNFLHSLNIEMQLKAYEIEKRLSTADLFRFPNFETICWYVGKHILDIFRGLRENRRHPASYLVHGGKALNLAFRAWTRKEALPDHEDEIPETVRTVQLIKDLAREIRLVEDIFQQNVGKTSNIFGLQRIFPAGSIPLTRPAHSTSVSMSRLSLPSKNGSKKKGLKPKELFKKAERKGKESSALGPAGQLSYNLMDTYSHQALKTGSFQKAKFNITGACLNDSDDDSPDLDLDGNESPLALLMSNGSTKRVKSLSKSRRTKIAKKVDKARLMAEQVMEDEFDLDSDDELQIDERLGKEKATLIIRPKFPRKLPRAKPCSDPNRVREPGEVEFDIEEDYTTDEDMVEGVEGKLGNGSGAGGILDLLKASRQVGGPDYAALTEAPASPSTQEAIQGMLCMANLQSSSSSPATSSLQAWWTGGQDRSSGSSSSGLGTVSNSPASQRTPGKRPIKRPAYWRTESEEEEENASLDEQDSLGACFKDAEYIYPSLESDDDDPALKSRPKKKKNSDDAPWSPKARVTPTLPKQDRPVREGTRVASIETGLAAAAAKLAQQELQKAQKKKYIKKKPLLKEVEQPRPQDSNLSLTVPAPTVAATPQLVTSSSPLPPPEPKQEALSGSLADHEYTARPNAFGMAQANRSTTPMAPGVFLTQRRPSVGSQSNQAGQGKRPKKGLATAKQRLGRILKIHRNGKLLL | |
Overview of Protein Modification Sites with Functional and Structural Information | ||
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* ASA = Accessible Surface Area
Locations | Modification | Substrate Peptides & Secondary Structure |
ASA (%) | Reference | Orthologous Protein Cluster |
---|---|---|---|---|---|
22 | Phosphorylation | PPPAPLDTTNLAGRR CCCCCCCCCCCCCCC | 25.85 | - | |
23 | Phosphorylation | PPAPLDTTNLAGRRT CCCCCCCCCCCCCCC | 28.09 | - | |
36 | Acetylation | RTLQGRAKMASVPVY CCCCCCHHHCCCCEE | 33.37 | 25953088 | |
36 | Ubiquitination | RTLQGRAKMASVPVY CCCCCCHHHCCCCEE | 33.37 | - | |
69 | Phosphorylation | CQDWFHGSCVGVEEE CCHHHCCCCCCCCHH | 9.32 | 20622854 | |
84 (in isoform 2) | Phosphorylation | - | 9.53 | - | |
100 | Ubiquitination | HGPSIMKKRRGSSKG CCCCHHCCCCCCCCC | 29.92 | - | |
104 | Phosphorylation | IMKKRRGSSKGHDTH HHCCCCCCCCCCCCC | 27.37 | 24260401 | |
105 | Phosphorylation | MKKRRGSSKGHDTHK HCCCCCCCCCCCCCC | 45.54 | - | |
117 | Ubiquitination | THKGKPVKTGSPTFV CCCCCCCCCCCCCHH | 56.55 | - | |
118 | Phosphorylation | HKGKPVKTGSPTFVR CCCCCCCCCCCCHHH | 43.03 | 30266825 | |
120 | Phosphorylation | GKPVKTGSPTFVREL CCCCCCCCCCHHHHH | 26.46 | 25159151 | |
122 | Phosphorylation | PVKTGSPTFVRELRS CCCCCCCCHHHHHHH | 36.14 | 22199227 | |
131 | Phosphorylation | VRELRSRTFDSSDEV HHHHHHCCCCCCCCE | 32.80 | 22468782 | |
135 | Phosphorylation | RSRTFDSSDEVILKP HHCCCCCCCCEEEEC | 39.37 | 22468782 | |
166 | Ubiquitination | VPILVLKKDGLGMTL CEEEEEEECCCCCCC | 53.52 | - | |
175 | Phosphorylation | GLGMTLPSPSFTVRD CCCCCCCCCCEECCE | 35.97 | 28348404 | |
179 | Phosphorylation | TLPSPSFTVRDVEHY CCCCCCEECCEEHHH | 20.97 | 24719451 | |
191 | Ubiquitination | EHYVGSDKEIDVIDV HHHCCCCCEEEEEEE | 59.26 | - | |
207 | Ubiquitination | RQADCKMKLGDFVKY CCCCCCCCHHHHHHH | 34.51 | - | |
213 | Ubiquitination | MKLGDFVKYYYSGKR CCHHHHHHHHHCCCH | 27.77 | - | |
214 | Phosphorylation | KLGDFVKYYYSGKRE CHHHHHHHHHCCCHH | 11.44 | - | |
215 | Phosphorylation | LGDFVKYYYSGKREK HHHHHHHHHCCCHHH | 5.85 | - | |
216 | Phosphorylation | GDFVKYYYSGKREKV HHHHHHHHCCCHHHE | 14.09 | - | |
219 | Acetylation | VKYYYSGKREKVLNV HHHHHCCCHHHEEEE | 51.98 | 23749302 | |
219 | Ubiquitination | VKYYYSGKREKVLNV HHHHHCCCHHHEEEE | 51.98 | - | |
244 | Methylation | SNLVETPKIVRKLSW HHHCCCHHHHHHHHH | 62.34 | - | |
248 | Ubiquitination | ETPKIVRKLSWVENL CCHHHHHHHHHHHHH | 35.66 | - | |
303 | Phosphorylation | LKGEKIFYLIRPTNA ECCCEEEEEECCCCC | 12.51 | 22817900 | |
359 | Phosphorylation | GWIHAVLTPVDCLAF CHHHEEEEHHHHHHC | 18.05 | - | |
373 | Phosphorylation | FGGNFLHSLNIEMQL CCCHHHHHCCHHHHH | 25.84 | - | |
383 | Phosphorylation | IEMQLKAYEIEKRLS HHHHHHHHHHHHHHC | 18.82 | - | |
446 | Ubiquitination | AFRAWTRKEALPDHE HHHHHHCHHHCCCCC | 39.71 | - | |
467 | Ubiquitination | VRTVQLIKDLAREIR HHHHHHHHHHHHHHH | 56.11 | - | |
486 | Ubiquitination | IFQQNVGKTSNIFGL HHHCCCCCCCCCCCC | 44.49 | - | |
486 (in isoform 2) | Phosphorylation | - | 44.49 | - | |
487 | Phosphorylation | FQQNVGKTSNIFGLQ HHCCCCCCCCCCCCC | 22.52 | 22210691 | |
488 | Phosphorylation | QQNVGKTSNIFGLQR HCCCCCCCCCCCCCE | 31.26 | 22210691 | |
505 | Phosphorylation | PAGSIPLTRPAHSTS ECCCCCCCCCCCCCC | 29.29 | 22210691 | |
516 | Phosphorylation | HSTSVSMSRLSLPSK CCCCCCCCCCCCCCC | 23.67 | 26471730 | |
519 | Phosphorylation | SVSMSRLSLPSKNGS CCCCCCCCCCCCCCC | 36.80 | 21815630 | |
522 | Phosphorylation | MSRLSLPSKNGSKKK CCCCCCCCCCCCCCC | 44.01 | 20068231 | |
523 | Ubiquitination | SRLSLPSKNGSKKKG CCCCCCCCCCCCCCC | 64.49 | - | |
527 | Ubiquitination | LPSKNGSKKKGLKPK CCCCCCCCCCCCCHH | 60.96 | - | |
528 | Ubiquitination | PSKNGSKKKGLKPKE CCCCCCCCCCCCHHH | 54.49 | - | |
545 | Ubiquitination | KKAERKGKESSALGP HHHHHCCCCCCCCCC | 58.41 | - | |
570 | Ubiquitination | TYSHQALKTGSFQKA HCCCHHHHHCCCCEE | 54.58 | - | |
576 | Ubiquitination | LKTGSFQKAKFNITG HHHCCCCEEEEEEEC | 52.08 | - | |
582 | Phosphorylation | QKAKFNITGACLNDS CEEEEEEECEECCCC | 21.60 | 22210691 | |
589 | Phosphorylation | TGACLNDSDDDSPDL ECEECCCCCCCCCCC | 41.69 | 20873877 | |
593 | Phosphorylation | LNDSDDDSPDLDLDG CCCCCCCCCCCCCCC | 27.58 | 24532841 | |
603 | Phosphorylation | LDLDGNESPLALLMS CCCCCCCCHHHHHHC | 29.25 | 28102081 | |
610 | Phosphorylation | SPLALLMSNGSTKRV CHHHHHHCCCCCHHH | 37.70 | 28102081 | |
613 | Phosphorylation | ALLMSNGSTKRVKSL HHHHCCCCCHHHHHC | 34.70 | 20873877 | |
614 | Phosphorylation | LLMSNGSTKRVKSLS HHHCCCCCHHHHHCC | 25.03 | 20873877 | |
621 | Phosphorylation | TKRVKSLSKSRRTKI CHHHHHCCHHHHHHH | 35.36 | 18669648 | |
651 | Phosphorylation | EDEFDLDSDDELQID HCCCCCCCCCCCHHH | 55.01 | 28102081 | |
665 | Ubiquitination | DERLGKEKATLIIRP HHHHCCCEEEEEECC | 50.59 | - | |
668 (in isoform 2) | Phosphorylation | - | 3.51 | - | |
669 (in isoform 2) | Phosphorylation | - | 1.87 | - | |
670 (in isoform 2) | Phosphorylation | - | 7.49 | - | |
685 | Phosphorylation | LPRAKPCSDPNRVRE CCCCCCCCCCCCCCC | 65.71 | - | |
686 (in isoform 2) | Phosphorylation | - | 51.73 | - | |
704 | Phosphorylation | EFDIEEDYTTDEDMV EEEECCCCCCCHHHH | 18.15 | 24532841 | |
705 | Phosphorylation | FDIEEDYTTDEDMVE EEECCCCCCCHHHHC | 39.84 | 28348404 | |
706 | Phosphorylation | DIEEDYTTDEDMVEG EECCCCCCCHHHHCC | 31.03 | 28348404 | |
722 | Phosphorylation | EGKLGNGSGAGGILD CCCCCCCCCHHHHHH | 29.48 | 22617229 | |
732 | Ubiquitination | GGILDLLKASRQVGG HHHHHHHHHHHCCCC | 52.17 | - | |
742 | Phosphorylation | RQVGGPDYAALTEAP HCCCCCCHHHHCCCC | 9.26 | 26074081 | |
746 | Phosphorylation | GPDYAALTEAPASPS CCCHHHHCCCCCCHH | 25.94 | 26074081 | |
751 | Phosphorylation | ALTEAPASPSTQEAI HHCCCCCCHHHHHHH | 20.51 | 26074081 | |
753 | Phosphorylation | TEAPASPSTQEAIQG CCCCCCHHHHHHHHH | 39.98 | 18669648 | |
754 | Phosphorylation | EAPASPSTQEAIQGM CCCCCHHHHHHHHHH | 33.54 | 26074081 | |
768 (in isoform 2) | Phosphorylation | - | 40.86 | - | |
790 | Phosphorylation | WTGGQDRSSGSSSSG ECCCCCCCCCCCCCC | 47.54 | 23927012 | |
790 (in isoform 2) | Phosphorylation | - | 47.54 | - | |
791 | Phosphorylation | TGGQDRSSGSSSSGL CCCCCCCCCCCCCCC | 43.52 | 23927012 | |
793 | Phosphorylation | GQDRSSGSSSSGLGT CCCCCCCCCCCCCCC | 29.06 | 23927012 | |
794 | Phosphorylation | QDRSSGSSSSGLGTV CCCCCCCCCCCCCCC | 31.86 | 23927012 | |
795 | Phosphorylation | DRSSGSSSSGLGTVS CCCCCCCCCCCCCCC | 30.07 | 23927012 | |
796 | Phosphorylation | RSSGSSSSGLGTVSN CCCCCCCCCCCCCCC | 39.73 | 23927012 | |
800 | Phosphorylation | SSSSGLGTVSNSPAS CCCCCCCCCCCCCHH | 26.29 | 23927012 | |
802 | Phosphorylation | SSGLGTVSNSPASQR CCCCCCCCCCCHHHC | 31.28 | 23927012 | |
804 | Phosphorylation | GLGTVSNSPASQRTP CCCCCCCCCHHHCCC | 17.84 | 23401153 | |
807 | Phosphorylation | TVSNSPASQRTPGKR CCCCCCHHHCCCCCC | 24.47 | 25159151 | |
810 | Phosphorylation | NSPASQRTPGKRPIK CCCHHHCCCCCCCCC | 28.84 | 30576142 | |
818 (in isoform 2) | Phosphorylation | - | 23.08 | - | |
821 (in isoform 2) | Phosphorylation | - | 9.71 | - | |
824 | Phosphorylation | KRPAYWRTESEEEEE CCCCCCCCCCHHHHH | 29.71 | 30266825 | |
826 | Phosphorylation | PAYWRTESEEEEENA CCCCCCCCHHHHHHC | 50.09 | 30266825 | |
834 | Phosphorylation | EEEEENASLDEQDSL HHHHHHCCCCCCCHH | 48.19 | 30266825 | |
840 | Phosphorylation | ASLDEQDSLGACFKD CCCCCCCHHHHHHCC | 28.53 | 27732954 | |
844 (in isoform 2) | Phosphorylation | - | 4.06 | - | |
850 | Phosphorylation | ACFKDAEYIYPSLES HHHCCHHHHCCCCCC | 13.89 | 23927012 | |
852 | Phosphorylation | FKDAEYIYPSLESDD HCCHHHHCCCCCCCC | 5.95 | 23927012 | |
854 | Phosphorylation | DAEYIYPSLESDDDD CHHHHCCCCCCCCCC | 28.00 | 22167270 | |
857 | Phosphorylation | YIYPSLESDDDDPAL HHCCCCCCCCCCHHH | 52.19 | 19664994 | |
866 | Phosphorylation | DDDPALKSRPKKKKN CCCHHHHCCCCCCCC | 55.45 | 23312004 | |
874 | Phosphorylation | RPKKKKNSDDAPWSP CCCCCCCCCCCCCCC | 45.83 | 30576142 | |
880 | Phosphorylation | NSDDAPWSPKARVTP CCCCCCCCCCCCCCC | 18.57 | 19664994 | |
886 | Phosphorylation | WSPKARVTPTLPKQD CCCCCCCCCCCCCCC | 12.66 | 30266825 | |
888 | Phosphorylation | PKARVTPTLPKQDRP CCCCCCCCCCCCCCC | 46.45 | 30266825 | |
900 | Phosphorylation | DRPVREGTRVASIET CCCCCCCCEEEEHHH | 19.74 | - | |
904 | Phosphorylation | REGTRVASIETGLAA CCCCEEEEHHHHHHH | 20.35 | 25159151 | |
907 | Phosphorylation | TRVASIETGLAAAAA CEEEEHHHHHHHHHH | 35.51 | 29978859 | |
915 | Acetylation | GLAAAAAKLAQQELQ HHHHHHHHHHHHHHH | 39.36 | 25953088 | |
915 | Ubiquitination | GLAAAAAKLAQQELQ HHHHHHHHHHHHHHH | 39.36 | - | |
923 | Ubiquitination | LAQQELQKAQKKKYI HHHHHHHHHHHHHHH | 66.46 | - | |
947 | Phosphorylation | EQPRPQDSNLSLTVP CCCCCCCCCCEEEEE | 34.13 | 23312004 | |
950 | Phosphorylation | RPQDSNLSLTVPAPT CCCCCCCEEEEECCC | 26.67 | 26074081 | |
952 | Phosphorylation | QDSNLSLTVPAPTVA CCCCCEEEEECCCEE | 22.52 | 29978859 | |
957 | Phosphorylation | SLTVPAPTVAATPQL EEEEECCCEECCCCE | 25.53 | 26657352 | |
961 | Phosphorylation | PAPTVAATPQLVTSS ECCCEECCCCEECCC | 11.22 | 29116813 | |
966 | Phosphorylation | AATPQLVTSSSPLPP ECCCCEECCCCCCCC | 31.33 | 30576142 | |
967 | Phosphorylation | ATPQLVTSSSPLPPP CCCCEECCCCCCCCC | 22.72 | 30576142 | |
968 | Phosphorylation | TPQLVTSSSPLPPPE CCCEECCCCCCCCCC | 26.98 | 29116813 | |
969 | Phosphorylation | PQLVTSSSPLPPPEP CCEECCCCCCCCCCC | 30.17 | 30576142 | |
1005 | Phosphorylation | GMAQANRSTTPMAPG CCCCCCCCCCCCCCC | 36.12 | 23684312 | |
1006 | Phosphorylation | MAQANRSTTPMAPGV CCCCCCCCCCCCCCE | 31.51 | 21815630 | |
1007 | Phosphorylation | AQANRSTTPMAPGVF CCCCCCCCCCCCCEE | 16.59 | 21815630 | |
1021 | Phosphorylation | FLTQRRPSVGSQSNQ EEEECCCCCCCCCCC | 36.98 | 23401153 | |
1024 | Phosphorylation | QRRPSVGSQSNQAGQ ECCCCCCCCCCCCCC | 28.42 | 28176443 | |
1026 | Phosphorylation | RPSVGSQSNQAGQGK CCCCCCCCCCCCCCC | 32.38 | 28176443 | |
1033 | Acetylation | SNQAGQGKRPKKGLA CCCCCCCCCCCCCHH | 58.60 | 25953088 | |
1043 | Sumoylation | KKGLATAKQRLGRIL CCCHHHHHHHHHHHH | 31.43 | - | |
1043 | Sumoylation | KKGLATAKQRLGRIL CCCHHHHHHHHHHHH | 31.43 | - | |
1043 | Ubiquitination | KKGLATAKQRLGRIL CCCHHHHHHHHHHHH | 31.43 | - | |
1051 | Sumoylation | QRLGRILKIHRNGKL HHHHHHHHCCCCCEE | 33.81 | - | |
1051 | Sumoylation | QRLGRILKIHRNGKL HHHHHHHHCCCCCEE | 33.81 | - |
Modified Location | Modified Residue | Modification | Type of Upstream Proteins | Gene Name of Upstream Proteins | UniProt AC of Upstream Proteins | Sources |
---|---|---|---|---|---|---|
69 | S | Phosphorylation | Kinase | CDK1 | P06493 | Uniprot |
120 | S | Phosphorylation | Kinase | CDK1 | P06493 | Uniprot |
904 | S | Phosphorylation | Kinase | CHEK1 | O14757 | GPS |
- | K | Ubiquitination | E3 ubiquitin ligase | CDC20 | Q12834 | PMID:23979597 |
* Distance = the distance between SAP position and PTM sites.
Modified Location | Modification | Variant Position (Distance <= 10) |
Residue Change | SAP | Related Disease | Reference |
---|---|---|---|---|---|---|
Oops, there are no SNP-PTM records of PHF8_HUMAN !! |
Kegg Disease | ||||||
---|---|---|---|---|---|---|
There are no disease associations of PTM sites. | ||||||
OMIM Disease | ||||||
300263 | Mental retardation, X-linked, syndromic, Siderius type (MRXSSD) | |||||
Kegg Drug | ||||||
There are no disease associations of PTM sites. | ||||||
DrugBank | ||||||
There are no disease associations of PTM sites. |
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Phosphorylation | |
Reference | PubMed |
"PHF8 mediates histone H4 lysine 20 demethylation events involved incell cycle progression."; Liu W., Tanasa B., Tyurina O.V., Zhou T.Y., Gassmann R., Liu W.T.,Ohgi K.A., Benner C., Garcia-Bassets I., Aggarwal A.K., Desai A.,Dorrestein P.C., Glass C.K., Rosenfeld M.G.; Nature 466:508-512(2010). Cited for: FUNCTION, SUBCELLULAR LOCATION, DOMAIN PHD-FINGER, INTERACTION WITHSETD1A; HCFC1 AND E2F1, CHARACTERIZATION OF VARIANT MRXSSD SER-315,PHOSPHORYLATION AT SER-69 AND SER-120, AND MUTAGENESIS OF SER-69;SER-120 AND HIS-283. | |
"Quantitative phosphoproteomic analysis of T cell receptor signalingreveals system-wide modulation of protein-protein interactions."; Mayya V., Lundgren D.H., Hwang S.-I., Rezaul K., Wu L., Eng J.K.,Rodionov V., Han D.K.; Sci. Signal. 2:RA46-RA46(2009). Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-120; THR-705; THR-706;SER-804; SER-854; SER-857 AND SER-880, AND MASS SPECTROMETRY. | |
"Lys-N and trypsin cover complementary parts of the phosphoproteome ina refined SCX-based approach."; Gauci S., Helbig A.O., Slijper M., Krijgsveld J., Heck A.J.,Mohammed S.; Anal. Chem. 81:4493-4501(2009). Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-120; SER-804; SER-857AND SER-880, AND MASS SPECTROMETRY. | |
"A quantitative atlas of mitotic phosphorylation."; Dephoure N., Zhou C., Villen J., Beausoleil S.A., Bakalarski C.E.,Elledge S.J., Gygi S.P.; Proc. Natl. Acad. Sci. U.S.A. 105:10762-10767(2008). Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT THR-705; THR-706; SER-722;SER-854; SER-857 AND SER-880, AND MASS SPECTROMETRY. | |
"Global, in vivo, and site-specific phosphorylation dynamics insignaling networks."; Olsen J.V., Blagoev B., Gnad F., Macek B., Kumar C., Mortensen P.,Mann M.; Cell 127:635-648(2006). Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-857, AND MASSSPECTROMETRY. | |
"Large-scale characterization of HeLa cell nuclear phosphoproteins."; Beausoleil S.A., Jedrychowski M., Schwartz D., Elias J.E., Villen J.,Li J., Cohn M.A., Cantley L.C., Gygi S.P.; Proc. Natl. Acad. Sci. U.S.A. 101:12130-12135(2004). Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-120, AND MASSSPECTROMETRY. |