L-Proline

L-Proline (proline) is a nonessential amino acid in humans. It is an essential component of collagen and is important for proper functioning of joints and tendons. It also helps maintain and strengthen heart muscles.

cis-L-Hydroxyproline inhibits the synthesis and extracellular deposition of collagen. The growth inhibition of pancreatic cancer cells induced by the Hyp isomer could be due to endoplasmatic reticulum stress.

DL-Proline is a natural product

L-Azetidine-2-carboxylic acid ((2S)-azetidine-2-carboxylic acid) is a toxic proline analogue produced by members of the Liliaceae and Agavaciae families.

L-Hydroxyproline (L-Hydroxyprolin) is one of the hydroxyproline (Hyp) isomers. L-Hydroxyproline is a useful chiral building block in the production of many pharmaceuticals.

L-Citrulline, an amino acid, is derived from ornithine during the catabolism of proline, glutamate, or glutamine, and also from L-arginine via the arginine-citrulline pathway.

(R)-pyrrolidine-2-carboxylic acid (D-Proline) is an isomer of the naturally occurring amino acid L-Proline. D-amino acids, including D-Proline, are found in relatively high abundance in human plasma and saliva, potentially originating from bacterial sources or endogenous production via amino acid racemase activity.

Hygric acid (N-Methyl-L-proline) is a proline analogue found in citrus juices and bergamot juice.

Arecaidine hydrochloride may have carcinogenesis.

Arecaidine hydrobromide is the salt form of Arecaidine, a pyridine alkaloid with potent GABA uptake inhibitory properties that acts as a substrate for H+-coupled amino acid transporter protein 1 (PAT1, SLC36A1) to competitively inhibit the uptake of L-proline.

Brevianamide F (Cyclo(L-Pro-L-Trp)), also known as cyclo-(L-Trp-L-Pro), is a naturally occurring 2,5-diketopiperazine with notable breast cancer resistance protein inhibitory activity.

Cyclo(L-Phe-trans-4-hydroxy-L-Pro) (Cyclo(L-phenylalanyl-trans-4-hydroxy-L-proline)) is a natural product found in Phellinus igniarius.

Stachydrine (N,N-Dimethyl-L-proline) is a major constituent of Chinese herb leonurus heterophyllus sweet used to promote blood circulation and dispel blood stasis. Stachydrine (N,N-Dimethyl-L-proline) can inhibit the NF-κB signal pathway. Stachydrine (N,N-Dimethyl-L-proline) is a biomarker for the consumption of citrus fruits.

H-Gly-Pro-OH (Glycyl proline) is a dipeptide composed of glycine and proline, and is an end product of collagen metabolism