The flight is mainly gliding due to very long primary feathers and small breast muscles . " Aerodramus " swiftlets, depending on species, weigh 8 35 grammes ( 0.28 1.23 oz ) and are 9 16 centimetres ( 0.28 1.23 in ) long.
22.
Transamination, or the transfer of an amine ( or NH 2 ) group from an amino acid to a keto acid by an aminotransferase ( also known as a " transaminase " ), was first noted in 1930 by D . M . Needham, after observing the disappearance of glutamic acid added to pigeon breast muscle.
