to different phylogenetic groups. This technique is called Fluorescence Activated Cell Sorting (FACS). Once the different species of bacteria are separated, their genomes are sequenced and the validation of the metagenomic analysis can be done. External links www.sciencemag.org References The Industrial Enzymologist: Les glicosil hidrolases, proteases i lipases T. Ponce Noyola, O. Pérez Avalos. Celulasas y xilanasas en la industria.a Departamento de Biotecnología y Bioingeniería del Cinvestav R. L. Baldwin, M. J. Allison. Rumen Metabolism. Journal of Animal Science 1983. 57:461-477 Introducción a la Digestión Ruminal Rev.Fac. Agron. LUZ. Volumen 15 número 1 Mundo Ganadero. El mensual Mundo Ganadero lo edita Eumedia, S.A. en Madrid. C/ Claudio Coello, 16. 28001 MADRID “Polysaccharide utilization by gut bacteria: potential for new insights from genomic analysis” Harry J. Flint, Edward A. Bayer, Marco T. Rincon, Raphael Lamed and Bryan A. White. Publicat a la revista Nature el Febrer de 2008 Bacteria