Table 1. The primers and site-directed mutable points of mutant keratinase genes.
Mutant gene | Primer | Sequences of primersa | Mutable points |
kerAopti1 | kerAopti1F | 5′-CCAGCTAAAAATGTTGAAAGGGA-3′ | CCG/CCA (Pro-3); GCG/GCT (Ala-4) |
kerAopti1R | 5′-GAGCGGTACCAGCAATCC-3′ | ||
kerAopti2 | kerAopti2F | 5′-GTCAGAAACAGACTCTCCAGCAC-3′ | CCG/CCA (Pro-3); GCG/GCT (Ala-4); CGC/AGA (Arg-322); CGT/AGA (Arg-324) |
kerAopti1R | 5′-TTGTGAAGCTGAAAGGTTCGGATG-3′ |
The mutable points are underlined.