Isolation and complete amino acid sequence of a basic low molecular weight protein from black swan egg white.
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.
D000595:Amino Acid Sequence; D000818:Animals; D001717:Birds; D003207:Conalbumin; D004220:Disulfides / Q000032:analysis; D004527:Egg Proteins / Q000302:isolation & purification*; D004529:Egg White; D008970:Molecular Weight; D013329:Structure-Activity Relationship
D004220:Disulfides; D004527:Egg Proteins; D003207:Conalbumin; C039942:cygnin