in the present study , the conversion subsequent to uptake of labeled glu , gln and pro to other amino acids was studied in unfractionated and subfractionated synaptosomal particles which layered , respectively , on 1.0 m , 1.2 m , 1.3 m and 1.5 m sucrose after centrifugation in a discontinuous gradient ( fractions 1-4 , respectively ) .
C0017797
gln
C0002520
amino acids