Figure 4.
Fig 4. (a) More O'Ferral diagram for -elimination of
galacto-configured uronic acids. (b) Putative E1cb/asynchronous
E2 reaction mechanism for Pel10 and related enzymes in which
proton abstraction by arginine is followed by leaving-group
elimination. The essential role of Asp389 may involve a role in
binding a second Ca^2+ ion as observed in Pel1C.
-elimination of
galacto-configured uronic acids. (b) Putative E1cb/asynchronous
E2 reaction mechanism for Pel10 and related enzymes in which
proton abstraction by arginine is followed by leaving-group
elimination. The essential role of Asp389 may involve a role in
binding a second Ca^2+ ion as observed in Pel1C.