[Yeast] BY157/158 genotype help

[jennifer.chiang from utoronto.ca]

Hello,

I need help with the correct genotype reference for two strains, BY157  
and BY158, which I've used for mating tests. I know that BY157 is MATa  
lys- cry-
and BY158 is MATalpha lys-, but would really appreciate more genotype detail.

Thanks!