TABLE 2.

Combinations of individual sORF mutations^a

Mutant	Individual sORF mutations combined
	A	B	C	D′	D	E	E′	E"	F
MAB	MA(TTG)	×
MAC	MA(TTG)		×
MABC	MA(TTG)	×	×
MDEb					×	×	×
MABCDEb	MA(TTG)	×	×		×	×	×
MD′DEb				×	×	×	×
ME"F								×	×
MALL+D′	MA(TTG)	×	×		×	×	×	×	×
MALL	MA(TTG)	×	×	×	×	×	×	×	×
MALL(TTT)	MA(TTT)	×	×	×	×	×	×	×	×
MALL+A(ACA)	MA(ACA)	×	×	×	×	×	×	×	×
MALL+A(gcT)	MA(gcT)c	×	×	×	×	×	×	×	×
MALL+A(TGg)	MA(TGg)c	×	×	×	×	×	×	×	×
MALL+A(stop)	MA(stop)c	×	×	×	×	×	×	×	×

^aIndividual sORF mutations are described in Table 1. 

^bCarries an in-frame ATG within sORF F (GTA545ATG), originating from strain S. 

^cThe sORF A ATG remains intact.