Key points are not available for this paper at this time.
Doris Rentsch, Brigitte Hirner, Elmon Schmelzer, Wolf B. Frommer, Salt Stress-Induced Proline Transporters and Salt Stress-Repressed Broad Specificity Amino Acid Permeases Identified by Suppression of a Yeast Amino Acid Permease-Targeting Mutant, The Plant Cell, Vol. 8, No. 8 (Aug., 1996), pp. 1437-1446
Rentsch et al. (1996) studied this question.