Osmotic pressures and sedimentation velocity of Gastrophilus methaemoglobin

Abstract
Measurements of the osmotic pressure of met-Hb prepared from tracheal cells of the larva of Gastrophilus yield a mean value of 34,000 [plus or minus] 3000 for the molecular wt. The material sedimented homogeneously in the ultracentrifuge with a sedimentation constant of 2.5 X 10-13.