Abstract
Hemoglobin Arlington Park was detected accidentally as result of the use of a tiemolysate which contained hemoglobin with normal electrophoretic mobility as a control for peptide mapping. Peptide maps of this hemolysate revealed 3 new peptldes resulting from 2 amino acid substitutions to give a new variant with the composition (B6 GlwLys, 95 Lys→Clu).