Known as: atrial natriuretic factor, Arg(101)-Tyr(126)-, rat, N-(N2-arginyl-arginyl)-21a-phenylalanyl-21b-arginyl-21c-tyrosine-atriopeptin 21, rat, Arg-Arg-Ser-Ser-Cys-Phe-Gly-Gly-Arg-Ile-Asp-Arg-Ile-G ly-Ala-Gln-Ser-Gly-Leu-Gly-Cys-Asn-Ser-Phe-Arg-Tyr