in glands perfused at constant flow rates with an amino acid-free krebs-albumin solution high umax values were measured : l-serine ( 66 % ) , l-alanine ( 54 % ) , l-leucine ( 43 % ) , l-phenylalanine ( 42 % ) and l-tyrosine ( 51 % ) .
C0002520
amino acid
C0001898
l-alanine