Table 2.

Active-site residues

Protein	Active sites	Corresponding position and color in Fig. 3	Active-site references
T4 lysozyme	Glu-11	Coil between helix A and β-sheet (grey)	34
	Asp-20	Coil in β-hairpin (red)
	Thr-26	Coil in the β-hairpin (red)
Myoglobin	Val-68	α-helix E (red)	35
	His-93	α-helix G (red)
	Ile-107	α-helix H (red)
HIV proteinase	Asp-25	Coil between G and C terminus (blue)	36
Lactoferrin	Asp-60	Coil (green)	37
	Tyr-92	Hinge β-strand (blue)
	Tyr-192	Terminus of the helix (green)
	His-253	Hinge (green)
Barnase	Glu-73	In β-strand E (red)	38
	His-102	Coil at the C terminus (blue)

The catalytic/binding residues at the binding sites. In barnase, HIV proteinase, and T4 lysozyme, these are the catalytic residues. In lactoferrin and myoglobin, these residues are involved in binding iron or heme. The corresponding color-coded assignments in Fig. 3 are noted.