both processes were involved in the uptake of l-alanine , l-glutamic acid , d-valine , and l-valine . d-valine competed with l-valine for entry into the cell through a single active process . d-alanine and l-alanine also utilized the same active process , but the d-isomer could not enter the cell through the passive process .
C0007634
cell
C0007613
the cell