the alteration in the regulation of branched chain amino acid operons may also explain why hist mutants are resistant to inhibition of growth by the amino acid analogues 5,5,5-trifluoroleucine , beta-hydroxyleucine , and norleucine and by the oligopeptides glycylglycylnorleucine and norleucylnorleucine .
C0002521
branched chain
C0002520
amino acid