Table 1. Matrix examination of BiFC interactions among MSUD proteins.

	SAD-1-YFPC	SAD-2-YFPC	YFPC-SAD-3	DCL-1-YFPC	QIP-YFPC	YFPC-SMS-2
SAD-1-YFPN
SAD-2-YFPN	+a
YFPN-SAD-3	+b	+b
DCL-1-YFPN	+ (A)	+ (B)	− (C)
QIP-YFPN	+ (D)	+ (E)	+ (F)	− (G)
YFPN-SMS-2	+ (H)	+ (I)	+ (J)	+ (K)	+c

A positive interaction between two proteins (i.e., one that leads to the reconstitution of the yellow fluorophore) is denoted by +. A negative result (−) may indicate that either the two proteins do not have intimate interaction or the BiFC assay is not sensitive enough to detect their weak/transient interaction. A–K in parentheses refer to Figure 1, A–K.

^aBardiya et al. (2008).

^bHammond et al. (2011a).

^cHammond et al. (2011b).