the serosal transfer of the following eight amino acids : threonine , alanine , serine , histidine , valine , methionine , phenylalanine and leucine , was measured using everted sacs of anterior intestine taken from goldfish acclimatized to 8 degrees c and incubated at 25 degrees c.2 .
C0002520
amino acids
C0001898
alanine