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Figure 4.
Fig. 4. Dianionbinding sites atthecatalytic site of GPb. Thediagram
showsthepositionsof PLPP(presentwork)andthepositions of
Lys 568, Arg 569, and Lys 574 asobserved in R-state Pb.Sulfate
(Barford & Johnson, 1989) and glucose-1-P (Hu, 1991) positionsob-
tainedfromstudieswiththeR-statecrystalsareshownassolidcircles.
Hptulose-2-P,obtainedfromstudieswiththeT-satecrystals(Jhn-
sonetal., 1990), s shownsuperimposedontheR-statestructure.
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