Both start from similar elementary proteinaceous structures; and both preserve their development upwards-each exhibiting some of the features of the other.
"Creation and Its Records"
B.H. Baden-Powell
And if we use this term with such caution as may properly arise out of our comparative ignorance of the things for which it stands, it may be truly said, that all protoplasm is proteinaceous, or, as the white, or albumen, of an egg is one of the commonest examples of a nearly pure proteine matter, we may say that all living matter is more or less albuminoid.
"Autobiography and Selected Essays"
Thomas Henry Huxley