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. 2026 Jan 31;31(3):501. doi: 10.3390/molecules31030501
P5C Δ1-Pyrroline-5-carboxylate
GSA L-Glutamate γ-semialdehyde
ProC Δ1-Pyrroline-5-carboxylate reductase (from E. coli, if not otherwise specified)
THP L-thioproline
DHP 3,4-dehydro-L-proline
A2C L-azetidine-2-carboxylate
P6C Δ1-piperideine-6-carboxylate
PIP L-pipecolate