[Physico-chemical properties of water-soluble proteins from Spirulina platensis]

By gel chromatography and polyacrylamide gel electrophoresis it was demonstrated that water-soluble proteins from Spirulina platensis contained components differing in their structure and having molecular weights ranging from 300,000+/-30,000 to 11,000 +/- 1,000. Electrophorectically the proteins were heterogeneous and their individual fractions differed in the number of pigment and protein components. The pigment-protein components were complexes in which the pigment was strongly bound to the protein. The protein components could be in a free state and in a pigment-bound state.