title: Puffing of polytene chromosomes in a plant (Phaseolus vulgaris).
mesh_terms: D002875:Chromosomes; D006570:Heterochromatin; D008858:Microscopy, Phase-Contrast; D010945:Plants, Edible / Q000166:cytology*; D012313:RNA / Q000096:biosynthesis
chemical_list: D006570:Heterochromatin; D012313:RNA