Table 3. Oligonucleotides Used for Site-Directed Mutagenesis.

name	sequence
W14A	5′-CTGAATGTTTTGGTACTTTCGCGCTTGTTTTTGGTGGCTCTGG-3′
A42F	5′-CATTGGTTTTGCCGGCGTGGCGTTGTTCTTCGGTCTGACCGTTCTGACGATGG-3′
G144F	5′-TTGAACTGGTATTGAGTGCATTTTTCCTGTTGGTGATCCACGG-3′
I176G	5′-CCTTAACCCTGATTCACTTAGGTAGTATTCCGGTGACTAACAC-3′