Literally meaning: “isomer of leucine”
Origin: Anc Greek
ίσος/isos(=equal) combining form ισο-/iso- eg isomer, isopod
The term was coined in 1904 by German F Ehrlich who observed that in sugar there was an amino acid very similar but not identical with leucine. Isoleucine’s constitution established 3 years later with consequent synthesis via the Strecker reaction.
Isoleucine is an essential amino acid that with valine and leucine is part of the three “branched chain amino acids” . Isoleucine helps to muscle recovery blood-clot formation and the regulation of blood sugar levels. Nutritional sources includes eggs, soy protein turkey, chicken cheese and fish