A NEW PHYCOERYTHRIN FROM PORPHYRA NAIADUM

Abstract
A new phycoerythrin, B-phyco-erythrin, isolated from P. naiadum, is described. The purification and crystallization and the ultracentrifugation, electrophoretic and optical properties of this pigment are discussed. It has a major aborption peak at 545 m[mu] with a minor, and transient, one at 565 m[mu], which tends to disappear on repeated crystallization. The molecular weight is apparently the same as that of R-phycoerythrin (ca. 290,000). Its iso-electric point is close to pH 4.5, and its mobility (toward the anode) at pH 5.0 is about 2 X 10-5 cm2/sec/volt.

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