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Figure 1.
Figure 1. Stereo drawings of the orientation of the RNase T, molecules in the unit cel (drawn with SCHAKAL:
Keller, 1988). For clarity, only C'' atoms are shown; the loop 91 to 101 s drawn in thick lines. (a) RNase T, wild-type.
Xote that the terminus Ala1 NH; of each molecule contacts the loop 91 to 101 of a symmetry-related molecule.
(b) RNase T, H92A-PEG. With respect to the wild-type structure, the u-axis is shortened ad the h-axis is lengthened.
Loop 91 to 101 contacts the a-helix of a symmetry-related molecule. (c) Rru'ase T, HOBA-phosphate. With respect to (b),
the b-axis is shortened. Segment 94 to 97 o loop 91 to 101 was located due to disorder and is therefore not drawn.
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