precursors of glycine in the nervous system : comparison of specific activities in glycine and other amino acids after administration of ( u- 14 c ) glucose , ( 3,4- 14 c ) glucose , ( 1- 14 c ) glucose , ( u- 14 c ) serine or ( 1,5- 14 c ) citrate to the rat .
C0017890
glycine
C0002520
amino acids