FLO1 is a variable green beard gene that drives biofilm-like cooperation in budding yeast. by Smukalla, S, Caldara, M, Pochet, N, Beauvais, A, Guadagnini, S, Yan, C, Vinces, MD, Jansen, A, Prevost, M, Latgé, J, Fink, G, Foster, K, Verstrepen, K