N-formyl-L-methionyl-L-isoleucyl-L-leucyl-L-phenylalaninate
n-formyl-l-methionyl-l-isoleucyl-l-leucyl-l-phenylalaninate
A peptide anion obtained by deprotonation of the carboxy group of <em>N</em>-formyl-<small>L</small>-methionyl-<small>L</small>-isoleucyl-<small>L</small>-leucyl-<small>L</small>-phenylalanine; major species at pH 7.3.