title: Subunit SA3 is not mandatory for the activity of calf thymus DNA-dependent RNA polymerase AI.
mesh_terms: D000818:Animals; D002417:Cattle; D012321:DNA-Directed RNA Polymerases / Q000302:isolation & purification / Q000378:metabolism*; D011487:Protein Conformation; D013329:Structure-Activity Relationship; D013698:Templates, Genetic; D013950:Thymus Gland / Q000201:enzymology
chemical_list: D012321:DNA-Directed RNA Polymerases