Table 1.

Binding site residues for (i) 2QK4, (ii) 1ZLY and (iii) 2V9Y.

No	PDB id	Substrate binding residues
1	2QK4	Lys148, Val160, Lys162, Glu190, Glu191, Leu192, Leu193, Glu197, Arg220, Asn229, Leu287
2	1ZLY	Ile91, Ala140, Glu141, Asp144, Val143, Leu85
3	2V9Y	Thr498, Gly499, Gly623, His620, Asn622, Met519, His680, Tyr537, Glu570