Fig. 3. (A) [³H]-D-Phe-L-Ala uptake in oocytes injected with either water or poly(A)⁺ mRNA. Values are means ± S.E.M. for 7-10 oocytes per condition, and are representative of two similar experiments; see Materials and methods for details. (B) Dose-dependent expression of D-Phe-L-Ala uptake (N=4). (C) Competition for peptide uptake in oocytes by the simultaneous presence of pairs of peptides (N=4).