Table 6.

Sequence of the leuB^- mutant and leuB⁺ revertants

Signal base substitution Sequence predicted at 856–858	Amino acid residue 286	Description
TTG	Leucine	LeuB- mutant
TCG	Serine	Wild type
GTG	Valine	Phenotypic wild type
ATG	Methionine	Phenotypic wild type
TTG	Leucine	Suppressor mutant
Amino acid residues in revertants		Description
Amino acid 286	Strain Type (Number)
Ser	X(4), Y(2), Z(1)	X: Isolated from solid Leucine Starvation plates
Ser	X(2), Y(3), Z(2)	Y: Isolated from liquid Leucine Starvation cultures
Met	X(2), Y(4), Z(1)	Z: Isolated from non-Starvation plates and cultures
Leu	X(3), Y(2), Z(1)