Hot papers in cell biology - J. Behrens, J.P. von Kries, M. Kuehl, L. Bruhn, D. Wedlich, R. Grosschedl, W. Birchmeier: "Functional interaction of beta-catenin with the transcription factor LEF-1" - Comments by Walter Birchmeier. Birchmeier, W. Scientist 13(8) : 15. 12 April 1999