Definitions

1. noun

a nonpolar essential amino acid that is one of the 20 amino acids that are coded for by the genetic code and is found in many proteins.

“The biochemical analysis of the protein showed that it contained a high proportion of isoleucine.”

2. chemistry

a branched-chain amino acid with the chemical formula C6H13NO2.

“Isoleucine is a nonpolar amino acid with a hydrophobic side chain.”