Table 1.

Light signaling components identified as BZS1-associated proteins

Gene ID	PSM in-IP1	PSM-in IP2	IP1 ratio (BZS1-YFP/Col)	IP2ratio (BZS1-YFP/Col)	Description	Reference
AT1G75540	10	12	1024	1024	B-box protein, STH2/BBX21	Datta et al., 2007
AT1G06040	2	2	5.88	11.12	B-box protein, STO/BBX24	Indorf, Cordero et al. 2007
AT5G11260	4	1	6.25	1024	bZIP transcription factor, HY5	Oyama et al., 1997
AT2G32950	1	2	5.56	3.83	COP1	Deng et al., 1991

BZS1-associated proteins known to be involved in light signaling are listed. PSM is the number of peptide-spectrum matches. The protein ratio is derived from peptide ratios using kernel density estimation as described by Liu et al. (2014). All the quantified peptides of STH2, STO, HY5 and COP1 show a ratio over 2× median of each IP, as listed in Table S1C.