Figure 4.
Substrate specificity for Mramp. (A) Abolition of 65Zn2+ uptake by Mn2+ in Mramp RNA–injected oocytes. Increase in uptake compared with control oocytes in the absence and presence of Mn2+ (10 mM as MnCl2; P = 0.01). (B) Uptake of 55Fe2+ by Mramp RNA–injected oocytes compared with water-injected controls (P < 0.001). (C) Influence of divalent cation competitors on 55Fe2+ (100 μM) uptake by Mramp RNA–injected oocytes. Data from one experiment. Displayed are mean values (± SE) of uptakes (10 oocytes per experimental condition).