STUDIES ON A BLUE-GREEN SERUM PIGMENT OF EEL-I

Abstract

A blue-green chromoprotein was isolated from the eel serum and characterized for some physico-chemical properties. It behaved homogeneously both in ultra-centrifugation and in electrophoresis. Its absorption maxima appeared at 279, 383 ?? 4 and 704 ?? 5mμ in an aqueous solution, indicating presence of a biliverdin-like prosthetic group. The isoelectric point was at about pH 4.7 and the molecular weight (M8. D), 89, 100. It showed no toxicity to mice, suggesting that the pigment and the toxicsubstance in eel serum are different.