Condensation of a properly protected uridylylated nucleopeptide with a heptadecapeptide gives after one-step deprotection the target nucleopeptide H-Gly-Ala-Tyr((5')pU)-Thr-Gly-Leu-Pro-Asn-Lys-Lys-Pro-Asn-Val-Pro-Thr-Ile-Arg-Thr-Ala-Lys-Val-Gln-OH. (C) 1998 Elsevier Science Ltd. All rights reserved.