[1] Univ Copenhagen, Dept Food Sci, DK-1958 Frederiksberg C, Denmark
[2] PCM, CRA, I-00016 Monterotondo, Italy
[3] Univ Zaragoza, Dept Prod Anim & Ciencia Alimentos, E-50013 Zaragoza, Spain
[4] Univ Bristol, Div Farm Anim Sci, Bristol BS40 5DU, Avon, England
[5] Gobierno Aragon, Ctr Invest & Tecnol Agroalimentaria, Zaragoza 50059, Spain
[6] INRA, Unite Rech Herbivores, Equipe Croissance & Metab Muscle, UR1213, F-63122 St Genes Champanelle, France
[7] Roslin Inst Edinburgh, Roslin EH25 9PS, Midlothian, Scotland