L-Proline, L-a-aspartyl-L-asparaginyl-L-asparaginyl-L-a-aspartyl-L-prolyl-L-isoleucyl -L-prolyl-L-a-glutamyl-L-prolyl-L-a-aspartyl-L-a-aspartyl-L-a-glutamyl-L-ser yl-L-phenylalanyl-L-asparaginyl-L-