Parks, B M Immunochemically detectable phytochrome is present at normal levels but is photochemically nonfunctional in the hy 1 and hy 2 long hypocotyl mutants of Arabidopsis. [electronic resource] - Plant molecular biology Apr 1989 - 425-37 p. digital Publication Type: Journal Article ISSN: 0167-4412 Standard No.: 10.1007/BF00017582 doi