STRUCTURE OF THE TYCC5-6 PCP-C BIDOMAIN OF THE TYROCIDINE SYNTHETASE TYCC LIGASE, MULTIFUNCTIONAL ENZYME, ANTIBIOTIC BIOSYNTHESIS, CONDENSATION DOMAIN, PEPTIDE BOND FORMATION, TYROCIDINE, ANTIBIOTICS, PHOSPHOPANTETHEINE, NONRIBOSOMAL PEPTIDE SYNTHETASE, PEPTIDYL CARRIER DOMAIN 2JGP