Rattin [1-24] 的来源是大鼠（褐家鼠）。

单字母 H2N-MAKRGFNCLLLSISEIDLPVKRLE-OH
多字母 H2N-Met-Ala-Lys-Arg-Gly-Phe-Asn-Cys-Leu-Leu-Leu-Ser-Ile-Ser-Glu-Ile-Asp-Leu-Pro-Val-Lys-Arg-Leu-Glu-OH
氨基酸个数 24
分子式 C122H209N33O34S2
平均分子量(MW) 2746.3
精确分子量(Exact Mass)(MW) 2744.51
等电点(PI) 10.78
pH=7.0时的净电荷数 2.95
参考文献：Caricasole A, Bruno V, Cappuccio I, Melchiorri D, Copani A, Nicoletti F. A novel rat gene encoding a Humanin-like peptide endowed with broad neuroprotective activity. FASEB J. 2002;16(10):1331-3.