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. 2018 Jun 12;7(2):34. doi: 10.3390/biology7020034

Figure 4.

Figure 4

Schematic drawing of the catalytic mechanisms. (A) The N-transcarbamylases use the direct attack mechanism for the carbamyl transfer reaction from CP to the amino group; (B) The O-transcarbamylases use a three-step reaction for the carbamyl transfer from CP to the hydroxyl group via carbamyladenylate intermediate.