T. Isemura, S. Ikeda
Feb 1, 1959
Citations
0
Influential Citations
11
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
To elucidate the roles of prolyl residue in polypeptide monolayers, the surface films of poly-DL-alanine, poly-L-prolyl-L-leucylglycine, copoly-1 : 1 : 1-(L-proline, L-leucine, DL-alanine), poly-L-proline and poly-L-hydroxyproline were studied by the surface pressure and potential measurements. The area of minimum surface compressibility and the smallest area of constant surface moment were assigned to each of the first three polypeptides which were found to form monomolecular films. In the region of large area their surface moments were equal to one another and, therefore, the orientations of carbonyl groups might be the same. From these data their chain configurations at the interface were deduced. Poly-DL-alanine exists in the β-configuration and the other two have the similar configuration except for the bonds attached to prolyl residues. Based on the departure in surface pressure behavior of copoly-1 : 1 : 1-(L-proline, L-leucine, DL-alanine) from that of poly-L-prolyl-L-leucylglycine, the arrangemen...