title: On the nature of  -galactosidase synthesized by DNA-directed cell-free system.
mesh_terms: D002474:Cell-Free System; D002499:Centrifugation, Density Gradient; D004279:DNA, Viral; D004591:Electrophoresis, Polyacrylamide Gel; D005696:Galactosidases / Q000032:analysis* / Q000096:biosynthesis / Q000302:isolation & purification; D009876:Operon; D014176:Protein Biosynthesis; D013347:Subcellular Fractions / Q000201:enzymology*; D014158:Transcription, Genetic
chemical_list: D004279:DNA, Viral; D005696:Galactosidases