Simpson R J, Morgan F J
Int J Pept Protein Res. 1983 Oct;22(4):476-81.
The following complete amino acid sequence of a low molecular weight basic protein (Mr 4,454) from black swan egg white has been determined: less than Glu-Val-Arg-Lys-Tyr-Cys-Pro-Lys-Val-Gly-Tyr-Cys-Ser-Ser-Lys-Cys-Ser-Lys-Ala-Asp-Val-Trp-Ser-Leu-Ser-Ser-Asp-Cys-Lys-Phe-Tyr-Cys-Cys-Leu-Pro-Pro-Gly-Trp-Lys. There is significant homology between this protein, provisionally designated cygnin, and the NH2-terminal region of the second domain of chicken ovotransferrin. The disulfide bonds have not been assigned; however, the arrangement of half-cystines in cygnin is sufficiently different from that of the known transferrins to suggest that cygnin is derived from another gene.
已测定了来自黑天鹅蛋清的一种低分子量碱性蛋白（分子量4454）的完整氨基酸序列：Glu-Val-Arg-Lys-Tyr-Cys-Pro-Lys-Val-Gly-Tyr-Cys-Ser-Ser-Lys-Cys-Ser-Lys-Ala-Asp-Val-Trp-Ser-Leu-Ser-Ser-Asp-Cys-Lys-Phe-Tyr-Cys-Cys-Leu-Pro-Pro-Gly-Trp-Lys及以下部分。该蛋白暂命名为天鹅蛋白，与鸡卵转铁蛋白第二个结构域的氨基末端区域存在显著同源性。尚未确定二硫键；然而，天鹅蛋白中半胱氨酸的排列与已知转铁蛋白的排列有足够差异，表明天鹅蛋白源自另一个基因。
