title: An optical system for the photography of fluorescent bands in preparative ultracentrifuge tubes.
mesh_terms: D002499:Centrifugation, Density Gradient / Q000295:instrumentation*; D004247:DNA / Q000032:analysis*; D005470:Fluorometry; D008722:Methods; D010617:Phenanthridines; D010781:Photography / Q000295:instrumentation
chemical_list: D010617:Phenanthridines; D004247:DNA