Figure 7
From: Prebiotic formation of cyclic dipeptides under potentially early Earth conditions

Mechanism for the formation of proline-containing cyclic dipeptides PTP: Proline triphosphate; CAPA: Cyclic acylphosphoramidates.
From: Prebiotic formation of cyclic dipeptides under potentially early Earth conditions
Mechanism for the formation of proline-containing cyclic dipeptides PTP: Proline triphosphate; CAPA: Cyclic acylphosphoramidates.