Kinetically distinguishable populations of phytochrome.
Two or more kinetically distinguishable populations of phytochrome molecules were observed in living tissues of oat, pea, maize, and cauliflower, as well as in extracts of oat. At least 3 different populations occurred in cauliflower florets, while 2 were observed in each of the other species. In extracted oat phytochrome, the relative proportions of the 2 forms remained constant during successive stages of purification. The physiological significance of this multiplicity of forms remains unclear.
Purves
W K
WK
The Biological Laboratories, Harvard University, Cambridge, Massachusetts 02138.
Briggs
W R
WR