Table 1.

AtNTR1 co-purifying proteins.

Gene ID	Gene name	MW (Da)	Number of unique peptides P1-P2-P3-P4
AT1G17070	AtNTR1	96,937	37-36-26-30
AT5G08550	ILP1	100,998	21-22-30-28
AT1G24180	IAR4	43,787	1-2-2-2
AT2G39770	CYT1	39,837	1-1-1-2
AT2G47580	U1A	58,456	1-1-1-1
AT2G30050	WD40	32,907	1-1-1-1

Seedlings of complementing AtNTR1-GFP transgenic lines, expressed under native promoter, were used for four independent purifications with three negative controls (Col-0). After trypsin digestion and mass spectrometry, proteins identified in all purifications but not in negative controls were listed in the table. Number of unique peptides matching each identified protein is shown separately for each purification (P1–4).