Expression of Cx37-C6A, -N55I, or -Q58L fails to suppress the proliferation of iRin cells. Increase in cell number over 15 days was evaluated in iRin cells induced (red filled symbols) or not (white filled symbols) to express Cx37-WT, -C6A, -N55I, or -Q58L. Proliferation was suppressed only in Cx37-WT-expressing cells. n = 3 for all groups, each experiment performed in triplicate. Error bars: S.E.