RNAi screen result	RNAPII IP (MG132)	CSB IP	CSB IP (MG132)	Chrom.	Chrom. (MG132)	Ubi /Phospo	Ubi /Phospho (MG132)
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Gene name	MGoogle Score	RNAi high	RNAi low	RNAPII-IP (MG132)	CSB-IP	CSB-IP (MG132)	Chrom.	Chrom. (MG132)
MAST4	0	0.540	-0.340
MAST4	0	0.720	-0.340
MAST2	0	-0.170	0.680
MAST3	0	-0.520	0.530

Gene name	PTM type	PTM site	UV	UV (MG132)	Sequence
MAST2	Phosphorylation	S66	-0.592		_EQDVVTGVS(ph)PLLFR_
MAST2	Phosphorylation	S74	0.187	0.488	_KLS(ph)NPDIFSSTGK_
MAST2	Phosphorylation	S148	0.211	0.337	_NQSLGQS(ph)APSLTAGLK_
MAST2	Phosphorylation	S876	0.406	0.431	_SLS(ph)EEKEDHSDGLAGLK_
MAST2	Phosphorylation	S900		-0.032	_SWVIGS(ph)PEILR_
MAST2	Phosphorylation	S931	-0.002	0.339	_RCS(ph)GLLDAPR_
MAST2	Phosphorylation	S1256	0.099	-0.774	_SLS(ph)SGESGPGSPTHSHSLSPR_
MAST2	Phosphorylation	S1381	-0.056	-0.059	_LHLS(ph)PPLGR_
MAST3	Phosphorylation	S711	0.306		_VYSSS(ph)EFLAVQPTPTFAER_
MAST3	Phosphorylation	S1223	0.701	0.567	_GQS(ph)ADKLGTGER_
MAST4	Ubiquitylation	K841		0.874	_LGTGGAYEVK(gl)QHR_
MAST4	Phosphorylation	S1373	-0.457	-0.761	_S(ph)AGNIPLSPLAR_
MAST4	Phosphorylation	S1782		-0.377	_VDSGTEKPGLVAPES(ph)PVRK_
MAST4	Phosphorylation	S1825	0.448	0.233	_TELPS(ph)PESAQSPSPSGDVR_