Proline, Pro

Germinate 20 mg fresh weight lots of Lilium longiflorum, cv. Ace pollen" in Petri dishes containing 10 mL medium supplemented with 0.1 p i[14C]-proline (pro) for 4 h at 27 2°C. 

Proline Pro HN T 1 F1 H—C- ch2 COOH 6.1 Imino acid — distorts the regular -helix structure... 

Also, in the form of N-(2-pyridylcarbonyl)proline Pro undergoes 1,3-dipolar cycloaddition with 2-chloroacrylonitrile to give two tetracyclic products and 61b in 5% yield (85TL5447). When Pro-OMe was heated with methyl cinnamate and benzaldehyde in toluene for several hours, two iso-... 

Collagen is the quantitatively most important protein in mammals, making up about 25% of the total protein. There are many different types of collagen, particularly in connective tissue. Collagen has an unusual amino acid composition. Approximately one-third of the amino acids are glycine (Gly), about 10% proline (Pro), and 10% hydroxyproline (Hyp). The... 

The triplet Cly-X-Y is constantly repeated in the sequence of the triple-helical regions— i. e., every third amino acid in such sequences is aglycine. Proline (Pro) is frequently found in positions X or Y the Y position is often occupied by 4-hydroxyproline (4Hyp), although 3-hydroxyproline (3Hyp) and 5-hydroxylysine (5Hyl) also occur. These hydroxylated amino acids are characteristic components of collagen. They are only produced after protein biosynthesis by hydroxylation of the amino acids in the peptide chain (see p. 62). 

Prokaryotic cells, definition of 2 Proline (Pro, P) 52s in helices 69 reductases 753, 755 Proline rings, torsion angles 62 Prontosil 473s Proofreading... 

---