Table 1.

ICU11 associates with the PRC2

	Protein	35S::GFP	gICU11-GFP icu11-3	icu11-3	gICU11-HA icu11-3	Col-0	EMF1-3XFLAG emf1	35S::GFP	35S:GFP-CLF clf-50	gSWN-GFP
Core PRC2	ICU11	0–0	13–19	0–0	12–11	0–0	11–20	0–0	13–2	5–5
	EMF2	0–0	11–4	0–0	29–0	0–0	2–22	0–0	33–18	4–36
	MSI1	0–0	12–6	0–0	25–2	3–2	6–18	2–0	22–18	6–26
	FIE	0–0	10–1	0–0	18–0	0–0	5–17	2–0	23–22	6–25
	SWN	0–0	10–0	0–0	27–0	0–0	0–26	0–0	11–0	21–68
	CLF	0–0	7–0	0–0	26–0	0–0	3–17	9–0	75–46	8–4
Accessory	EMF1	0–0	5–3	0–0	26–2	0–0	6–40	0–0	46–17	2–37
	LHP1	0–0	2–1	0–0	11–0	0–0	2–14	0–0	22–8	3–18
	TRB1	0–0	5–9	0–0	12–2	0–0	0–1	0–0	0–0	0–0
	TRB2	0–0	9–5	0–0	15–1	0–0	1–11	0–0	11–3	2–10
	TRB3	0–0	9–6	0–0	15–3	0–0	3–12	0–0	9–4	2–7
	VRN5	0–0	0–0	0–0	0–0	0–0	0–0	0–0	24–13	0–24
	VEL1	0–0	0–0	0–0	0–0	0–0	0–0	0–0	41–28	0–46
	ALL PEPTIDES	787–1817	1286–7239	2944–3524	5481–6267	11483–16737	11170–13095	6705–2489	7376–7714	5127–6855

The numbers indicate uniquely identified peptides from each protein found by mass spectrometry in two independent experiments. The total number of peptides identified in each experiment is also indicated at the bottom of the columns. PRC2 core components are shown at the top, with accessory components below. Columns are paired with control on left and immunoprecipitated to the right. For example, 35S:GFP samples in column 1 were the control for the ICU11-GFP samples in column2 in the gICU11-GFP analysis. 35S:GFP-CLF clf50 and gSWN-GFP share the 35S::GFP control. The full list of proteins identified is presented as an excel sheet in Dataset S1.