Cygnus atratus

Koh, T.S. and M.J. Harper. 1988. Lead-poisoning in black swans, Cygnus atratus, exposed to spent lead shot at Bool Lagoon Game Reserve, South Australia. Austral. Wildl. Res. 15 395-403. 

Although all species of bird previously studied produce only one form of lysozyme in the egg-white, two distinct lysozymes have been isolated from the whites of black swans (Cygnus atratus) eggs. The molecular weight, amino-acid sequence, specific activity, and immunological cross-reactivity of one of them are similar to those of the egg-white lysozymes of hen, duck, and many other birds, whereas those of the other form (mol. wt. 2.05 x 10 ) are not. However, the iV-terminal amino-acid sequence and immunological cross-reactivities are... 

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