Construct: Amino acid replacement: H?R. Nucleotide substitution: TGGCAT?TGGCGT Amino acid replacement: C?S. Nucleotide substitution: AGTTGC?AGTTCC Amino acid replacement: C?S. Nucleotide substitution: CAGTGC?CAGTCC Amino acid replacement: C?S. Nucleotide substitution: GCCTGT?GCCTCT Amino acid replacement: H?R. Nucleotide substitution: TTTCAC?TTTCGC Amino acid replacement: C?S. Nucleotide substitution: AACTGC?AACTCC Amino acid replacement: C?S. Nucleotide substitution: TGCTGC?TGCTCC Amino acid replacement: C?S. Nucleotide substitution: GTCTGC?GCCTCC