- Replacement by a lacZ reporter gene assigns mouse connexin36, 45 and 43 to distinct cell types in pancreatic islets. Theis, M., Mas, C., Döring, B., Degen, J., Brink, C., Caille, D., Charollais, A., Krüger, O., Plum, A., Nepote, V., Herrera, P., Meda, P., Willecke, K. Exp. Cell Res. (2004)