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Plant and Cell Physiology, 1970, Vol. 11, No. 3 427-434
© 1970

Article

Isolation and characterization of the 337 mµ UV-absorbing substance in red alga, Porphyra yezoensis UEDA1

TAMAO YOSHIDA and P. M. SIVALINGAM2

Laboratory of Marine Biochemistry, Tokyo University of Fisheries Minato-ku, Tokyo, Japan

Using a variety of Sephadex gel filtrations, starch block zone electrophoresis, Avicel SF preparative TLC and DEAE cellulose column chromatography, the characteristic 337 mµ UV-absorbing substance from marine red alga, Porphyra yezoensis UEDA was isolated. The molecular weight of this substance was about 1,000, and its chemical composition was 43.11% C, 5.85% H, 7.23% N, 34.73% O and 9.08% Na. In vivo it is located in the chloroplast. On irradiation at 378 mµ, it has a fluorescence action spectrum peak at 470 mµ. Structural studies on this substance are still underway, but it could be a kind of aminosugar judging from NMR, IR spectra and other chemical properties.

1This work was partially supported by the grant of the Ministry of Education in 1969

2Present address: Department of Biochemistry and Biophysics, University of Hawaii, Honolulu, Hawaii 96822, U.S.A.

(Received December 21, 1969; )
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