They are phenylalanine, valine, threonine, tryptophan, methionine, leucine, isoleucine, lysine, and histidine. Those amino acids being leucine, isoleucine, and valine. The amino acids in question are leucine, isoleucine and valine. Like valine and isoleucine, leucine is a branched-chain amino acid. Like leucine and isoleucine, valine is a branched-chain amino acid. So-called aliphatic glucosinolates derived from mainly methionine, but also alanine, leucine, isoleucine, or valine. This operon is bound and inactivated by valine, leucine, and isoleucine. Among the proteinogenic amino acids, there are three BCAAs&colon; leucine, isoleucine, and valine. The complex is essential for breaking down the amino acids leucine, isoleucine, and valine. The aspartate family of amino acids includes&colon; threonine, lysine, methionine, isoleucine, and aspartate. It is also rich in essential amino acids such as Lysine, Phenylalanine, Leucine, Isoleucine. It contains no tryptophan and is deficient in isoleucine, threonine, and methionine. Homoserine is an intermediate in the biosynthesis of threonine, isoleucine, and methionine. The exceptions are two amino acids with two stereogenic centers, threonine and isoleucine. In this mutation, a "typo" in the DNA mistakes isoleucine for lysine.