Abstract
Streptomyces canus ISP5017 produced a mixture of carotenoids by photoinduction. Biochemical studies on the mechanism of photochromogenicity in Streptomyces canus showed that photochromogenicity consists of a photochemical reaction step and a light-independent metabolic reaction step. In the former step, both light and oxygen were required. In the latter step, de novo protein synthesis was induced, as light exposure at 0-4 °C did not induce carotenoid synthesis in S. canus.
