31. Media lacking an amino acid such as proline in conjunction with map bacterial chromosomes. 32. Proline enters a catalytic cycle by reacting with the aldehyde to form an enamine.33. These six are arginine, cysteine, glycine, glutamine, proline and tyrosine. 34. A proline rich region is also predicted to lie between residues 161-170. 35. This enzyme participates in arginine and proline metabolism. 36. This enzyme belongs to the family of proline racemases acting on free amino acids. 37. These enzymes catalyse the interconversion of L-and D-proline in bacteria. 38. Pin1 activity regulates the outcome of proline -directed kinase ( e . g. 39. M4 is unwound in this region due to a conserved proline ( P308 ). 40. A proline -rich region was also revealed at 14-65 amino acids.