Peptides Containing The C-terminal Sequence (x-cys-phe-gly-phe-gly-gly Arg-a-asp-arg-ile-gly-ala-gln-ser-gly-leu-gly-cys-y) With X Being Nh, Y Being -oh, Nh, Or Part Of The Sequence -asn-ser-phe-arg-tyr-arg-arg- And A Being Met Or Ile, E.g., Atriopeptine; Atrial Natriuretic Peptides And Proteins (anp) (c07k-99/00c) Patents (Class 930/DIG553)