5. Basic Mechanism of Site-directed mutagenesis + polymerase + primer replication Mutant translation Wild type translation Only one amino acid changed Wild type protein Mutant protein primer (1) (2) (3) (5) (4) (6) Val -> Thr Smith (1993) Juang RH (2004) BCbasics CAG GTC CAG G C C CAG G C C CAG G C C C G G Thr GTC CAG Val