Figure 4 - full size

 

Figure 4.
Figure 4. Interactions made by Thr16 to the major groove of the palindromic pur operator. The side- chain hydroxyl group makes three potential hydrogen bonds to bases in the operator sequence, and the C g group potentially interacts with the C5 methyl group of Thy60.

The above figure is reprinted by permission from Elsevier: J Mol Biol (1999, 291, 347-361) copyright 1999.