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PHOTOCHEMISTRY OF HIGH MOLECULAR WEIGHT PHYTOCHROME IN VITRO *
Author(s) -
Pratt Lee H.
Publication year - 1975
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1975.tb06717.x
Subject(s) - pisum , secale , phytochrome , avena , etiolation , sativum , quantum yield , red light , chemistry , biology , botany , photochemistry , biochemistry , fluorescence , physics , enzyme , optics
— –Photochemical properties of phytochrome have been reexamined with preparations of high molecular weight chromoproteins from etiolated oat (Avena sativa L., cv. Garry), rye (Secale cereale L., cv. Balbo) and pea (Pisum sativum L., cv. Alaska) shoots. The proportion of the total phytochrome pool in such preparations present as the far‐red‐absorbing form (Pfr) at photoequilibrium in red light is 0–75. The ratio of the quantum yields for the phototransformation of the red‐absorbing form (Pr) to Pfr and of Pfr to Pr is 1‐0. The absolute quantum yield for these two photoreactions is 017.