Fig. 4. MAb 12G10-induced cell-cell adhesion is dependent on cAMP. The effect of Rp-cAMPS on HT-1080 cell-cell adhesion stimulated with 10 µg/ml 12G10. The dotted lines represent the level of basal HT-1080 cell-cell adhesion±s.d. (n=8). CCAI was scored and defined as described in Materials and Methods.