TABLE 1.

Interactors for FLAG-PP4c FLAG-PP4c was stably expressed in HEK293 cells. AP/MS was performed as described under “Experimental Procedures” (n = 6).

Name	Gene	Accession	Mra	MSb	UPc	TPd	%Ce	Reference
DHX38	DHX38	NP_054722	140.42	1558	24	67	25	This study
PP4R3A	SMEK1	NP_115949	93.84	1534	24	94	39	18
CCT2	CCT2	NP_006422	57.45	1482	20	75	47	18
CCT8	CCT8	NP_006576	59.58	1272	19	73	38	18
PP4R2	PPP4R2	NP_777567	46.87	1217	17	67	58	14
TCP1	TCP1	NP_110379	60.31	1197	18	59	44	18
CCT5	CCT5	NP_036205	59.63	1087	22	58	43	18
CCT3	CCT3	NP_005989	60.42	993	17	50	35	18
CCT6A	CCT6A	NP_001753	57.99	998	16	51	39	18
PP4R3B	SMEK2	NP_065196	87.32	969	11	57	29	18
CCT4	CCT4	NP_006421	57.89	918	13	51	39	18
α4	IGBP1	NP_001542	39.2	866	17	60	50	18
PP4R1	PPP4R1	NP_001035847	105.13	863	14	31	22	12
CCT7	CCT7	NP_006420	59.33	907	14	54	33	18
CCDC6	CCDC6	NP_005427	53.26	562	8	27	22	27
KIAA1622	KIAA1622	NP_478144	99.39	334	6	10	10	This study
PP2A Aα	PPP2R1A	NP_055040	65.27	357	6	12	15	27
PP2A B′δ	PPP2R5D	NP_006236	69.95	257	5	9	14	This study

^aM_r, calculated molecular mass of the protein

^bMS, averaged Mascot score per analysis

^cUP, averaged number of unique peptides observed per analysis

^dTP, averaged total number of peptides (spectral counts) identified per analysis

^e%C, averaged percentage amino acid coverage per analysis