when the ratio of amino acid liberation velocity to lap activity measured with leu-p-nitroanilide was calculated , the ratios for cyclic amino acids such as tyr2 and ile3 were high with the placental particulate fraction , the mixture of post-proline endopeptidase and microsomal p-lap , retroplacental p-lap , and pregnancy serum .
C0002520
amino acid
C0002522
cyclic amino acids