title: The active form of phytochrome: a new hypothesis based on phytochrome pelletability studies.
mesh_terms: D001665:Binding Sites; D004307:Dose-Response Relationship, Radiation; D008027:Light; D008956:Models, Chemical; D010834:Phytochrome; D010940:Plant Proteins; D011485:Protein Binding; D013053:Spectrophotometry
chemical_list: D010940:Plant Proteins; D010834:Phytochrome