Table 1.

Summary of mass-spectral sequencing analysis of FLAG-ESP IP-specific peptides

Protein	Predicted Mr, Da	Total peptides	Unique peptides	P	Sf	XCorr
FLAG-ESP5 (CPSF100/At5g23880)	85,124	153	21	2.22e−15	16.42	200.31
CPSF160/At5g51660	158,064	37	12	1.18e−11	11.03	116.27
CPSF73/At1g61010	77,395	25	10	3.25e−12	8.35	90.33
ESP4/Symplekin/At5g01400	159,469	21	8	4.15e−9	2.71	30.26
FY/Pts2/At5g13480	−79,195	12	4	2.90e−7	2.64	30.17