. 2019 Jul 17;93(15):e00494-19. doi: 10.1128/JVI.00494-19

TABLE 2.

Summary of the accessory protein requirements for each Syn mutant^a

Accessory proteins	Cell-to-cell spread	gBsyn	gKsyn			UL20syn		UL24syn
Accessory proteins	Cell-to-cell spread	A855V	A40V	L118Q	G167D	R209A	F222A	E99A/K101A	G121A
gE	+	+	–	–	+	+	+	+	+
gI	+	–	–	–	–	–	–	+	+
UL16	+	+	–	–	+	+	+	+	+
UL21	+	+	–	–	–	–	–	–	–

The results for UL21 were previously reported and are shown for comparison (33).