Isoelectric focusing of lateral muscle myogen and haemoglobins of two species of Mugilidae.

1. The myogen protein patterns of lateral muscle of Liza ramada (Risso) and Chelon labrosus (Risso), revealed by isoelectric focusing, are reported. Specific differences are noted both in the white and in the red muscle (where they are more evident). 2. Red muscle shows the presence of a chromoprotein, found to be myoglobin, with a pI characteristic for the species. 3. Blood haemoglobins were examined with the same technique and also found to be species specific.