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isoleucine vs. leucine

isoleucine

[ahy-suh-loo-seen, -sin] / ˌaɪ səˈlu sin, -sɪn /

noun

Biochemistry.

a crystalline amino acid, C 6 H 13 O 2 , occurring in proteins, that is essential to the nutrition of humans and animals. Ile; I

leucine

[loo-seen, -sin] / ˈlu sin, -sɪn /

noun

Biochemistry.

a white, crystalline, water-soluble amino acid, C 6 H 13 NO 2 , obtained by the decomposition of proteins and made synthetically: essential in the nutrition of humans and animals. Leu; L