RNAi screen result	RNAPII IP (MG132)	CSB IP	CSB IP (MG132)	Chrom.	Chrom. (MG132)	Ubi /Phospo	Ubi /Phospho (MG132)
W

Gene name	MGoogle Score	RNAi high	RNAi low	RNAPII-IP (MG132)	CSB-IP	CSB-IP (MG132)	Chrom.	Chrom. (MG132)
PHC1	1	-1.150	1.170				1.791	0.770
PHC1	1	1.810	-0.840				1.791	0.770
CBX4	0	0.230	0.160				0.798	0.323
BMI1	0	0.900	-1.150	0.182
RING1	0	-0.780	0.650	-0.374	-0.106	0.665	0.119	0.685

Gene name	PTM type	PTM site	UV	UV (MG132)	Sequence
CBX4	Phosphorylation	S291	0.263	0.125	_SGEVAEGEARS(ph)PSHKK_
CBX4	Phosphorylation	S293		0.227	_SGEVAEGEARSPS(ph)HKK_
PHC1	Phosphorylation	T1017		-0.396	_DLGNPNTAPPT(ph)PELHGINPVFLSSNPSR_
RING1	Phosphorylation	S38	0.184		_TPQEAIMDGTEIAVS(ph)PR_
RING1	Phosphorylation	S140	1.059	0.697	_LHNQQALSSS(ph)IEEGLR_
RING1	Phosphorylation	T238		-3.017	_GGT(ph)LGGGTLGPPSPPGAPSPPEPGGEIELVFRPHPLLVEK_
RING1	Phosphorylation	S248	-2.713	-2.837	_GGTLGGGTLGPPS(ph)PPGAPS(ph)PPEPGGEIELVFRPHPLLVEK_
RING1	Phosphorylation	S254		-2.788	_GGTLGGGTLGPPS(ph)PPGAPS(ph)PPEPGGEIELVFRPHPLLVEK_
RING1	Ubiquitylation	K285	0.816	0.881	_YVK(gl)TTGNATVDHLSK_