61:256-263 , 1987 ) that the temperature-sensitive phenotype of tso23 is due to a phenylalanine substituted for leucine at amino acid 111 , rather than the his-227 -- -- tyr substitution or the gly-21 -- -- glu substitution , which independently accounts for the loss of epitope 1 in the mutant m protein of tso23 .
C0002520
amino acid
C0017890
gly