166 PPIB_STRAT Rotamase cyp18 MSTVELNTSAGRIVLELNDAEAPKTVENFLAYVRSGHYDGTIFHRVISDFMIQGGGFTPDMQQKSTLAPIQNEADNGLRNDNYTVAMARTNDPHSATAQFFINVKDNAFLNHTSKTPNGWGYAVFGRVTEGQDVVDAIKGVKTGSSRGHQDVPVQPVVIESAKILG PPIases accelerate the folding of proteins. It catalyzes the cis-trans isomerization of proline imidic peptide bonds in oligopeptides. cyp18 Peptidyl-prolyl cis-trans isomerase cyp18