Table 1.

Identification of CSN1-NTD interacting proteins

Band No.	Peptides	Protein identity (accession No.)	Putative function
p130	(K)TPVEEVPAAIAPFQGRVLIGVGK (K)QQEIVVSRGK	SAP130/SF3b-3, (BC011412)	RNA splicing, transcription
p100	(K)GFRQGPQPFTQQK (K)EATQTVAADTRP	Un-assignable
p95	(K)YYEQFSK	HSP90, silkworm (BAB41209)	Chaperon
p82	(K)REVDDLGPEVGDIK (K)VYNPRIRVESLLVTAISK	Ddx15/mDEAH9/prp43 (O35286)	RNA splicing
p72-77	(K)SQIHDIVLVGGSTRIPK (K)HWPFMVVNDAGRPK (K)LLQDFFNGK (K)TVQNAVITVPAYFNDSQRQATK	Hsc70 family, Hspa8 (NP_112442)	Chaperon
p46	(K)LHREFHYGPDPQPVMQLDG (K)EGAVATRFHITKYPTLK	CG9911 Drosophila (AAF48579) similar to mouse ERp44	oxidative protein folding in the ER
p41	(K)FFENRANGQSK (K)EIHGQHPVVTLPTK (K)RALNQFESQ	Insect homolog (XP_313937) of CPSF6/CFIm68	mRNA 3' processing