[Selection of cell lines resistant to cyclic AMP and theophylline from murine plasmocytoma MOPC 173. Cross resistance to ouabain and concanavalin A].

Using cAMP or theophyllin as selective agents, we obtained from contact inhibited and non contact inhibited cell lines, derived from the same plasmocytoma, different resistant cell lines. All of them were cAMP and theophyllin resistant and also ouabain and con A resistant as judged by the growth curves in presence of the different drugs.