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机译:
Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA;
Univ Calif Los Angeles, Inst Mol Biol, Los Angeles, CA 90095 USA;
POLYMERASE ACTIVE-CENTER; START SITE SELECTION; FACTOR-TFIIB; IN-VITRO; PREINITIATION COMPLEX; CONFORMATIONAL-CHANGE; STRUCTURAL BASIS; INITIATION; ELONGATION; DNA;