Table S1.

MS analysis of mutant SAGA complexes

Subunit	Yeast strain
	WT	sgf29Δ	gcn5 bromoΔ	spt3Δ
Tra1	383	460	473	597
Spt7	205	231	240	317
Ada3	122	115	144	175
Spt20	109	134	146	178
Taf5	84	98	100	144
Ada1	73	75	83	104
Taf12	104	87	94	111
Spt8	58	76	80	106
Taf6	52	62	64	79
Sgf73	80	92	98	125
Ubp8	53	59	63	79
Ada2	52	55	62	85
Gcn5	56	67	55	100
Sgf29	34	0	42	52
Taf10	32	36	39	37
Spt3	32	37	50	6*
Taf9	23	24	23	31
Sgf11	18	15	13	10
Sus1	22	21	20	20

The numbers represent total peptides obtained for each component.

^*Note that the spt3Δ strain has partial Spt3 deletion (spt3Δ203) (Table S2). Therefore, trace amounts of Spt3 were detected.