The approximate biotin requirements of breeding hens have been established and the embryos examined for gross pathological symptoms and the approximate age at death are recorded. Cravens, W.W., W., & Sebesta, M.A. (1944). Effect of biotin deficiency on embryonic development in the domestic fowl.

Dimeric members of the avidin family are also found in some bacteria. In chicken egg white, avidin makes up approximately 0.05% of total protein (approximately 1800 Ī¼g per egg). The tetrameric protein contains four identical subunits (homotetramer), each of which can bind to&nbs