Fleming N, Balls M
Experientia. 1976 Feb 15;32(2):169-71. doi: 10.1007/BF01937746.
High concentrations (10 mM) of alanine, glycine, and glutamic acid in the culture medium had no effect on urea production in Amphiuma means liver in organ culture. Ammonia production was increased in media containing added alanine and glycine, but reduced in medium with added glutamic acid.