Identification of phycocyanin isolated from Porphyra tenera and Porphyra yezoensis

The solution properties of phycocyanin isolated from two pure Porphyra , i.e. Porphyra tenera and Porphyra yezoensis , were compared with those of phycocyanin from dried laver. All showed similar sedimentation behavior. The sedimentation constant of phycocyanin from Porphyra tenera was 11.5S and that from Porphyra yezoensis was 11.9S. Those values were in good agreement with the value of 11.3S reported for phycocyanin from dried laver. Both phycocyanins showed self-association behavior in solution at pH 5.4, the self-association reaction system was assumed to be monomer arrow right hexamer. The results showed that the phycocyanins investigated in this work were the same.