>8GOJ_2|Chains B, D|Lac23ys_KK, a basic mutant of LacI C-terminal tetramerization helix|Escherichia coli (562)
TASPRALADKLKQLAYKVKRLSS
>8GOJ_1|Chains A, C|Lac23ys_EE, an acidic mutant of LacI C-terminal tetramerization helix|Escherichia coli (562)
TASPRALADELEQLAYEVERLSS