Repositorio Institucional de la Universidad de Oviedo

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This study was supported in part by the Spanish MEC (grant AGL2003-229). A. M. and L. F. were recipients of predoctoral fellowships from the MEC. We thank Dr B. Mayo for his advice in Lactococcus genetics and Dr A. F. Braña for critical reading of the manuscript. We also thank Dr L. Gusmani and Dr J. P. May for sending us the L. garvieae strain UNIUD074 and the plasmid pTV408, respectively.