caa a22 4500 386322023 CHVBK 20180307111629.0 cr unu---uuuuu 161130e198807 xx s 000 0 eng 10.1079/BJN19880087 doi S0007114588000881 pii (NATIONALLICENCE)cambridge-10.1079/BJN19880087 Bonhomme-Florentin A. L.A. CNRS n° 138, Groupe de Zoologie et Protistologie, les Cézeaux, BP 45, 63170 Aubiere, and Laboratoire de Zoologie, U.F.R. Sciences, BP 347, 51062 Reims-Cédex, France Degradation of hemicellulose and pectin by horse caecum contents [Elektronische Daten] [A. Bonhomme-Florentin] 1. Polysaccharide depolymerases and glycoside hydrolases involved in the breakdown of plant structural polysaccharides (hemicellulose and pectins) were monitored in three fractions of the liquid phase of horse caecum digesta: acellular fluid (AF), bacteria (B) and protozoa plus bacteria (PB). 2. Both bacteria and protozoa were found to be involved in the decomposition of pectic substances, with two enzymic activities: depolymerase (polygalacturonase, EC 3.2.1.15; and pectin lyase, EC 4.2.2.10) and esterase (pectinesterase, EC 3.1.1.11). The activity of the PB fraction was higher than that of B. 3. With hemicellulosic substrates, all three fractions showed a significant xylan endo-1,3-β-xylosidase (EC 3.2.1.32) activity. Mannan was hardly broken down. 4. Galactomannan and arabinogalactan were broken down more extensively by the PB fraction than by the B fraction. Glycosidase activities (xylan 1,4-β-xylosidase, EC 3.2.1.37 and α-L-arabinofuranosidase, EC 3.2.1.55) were also observed. Copyright © The Nutrition Society 1988 British Journal of Nutrition Cambridge University Press 60/1(1988-07), 185-192 0007-1145 60:1<185 1988 60 BJN https://doi.org/10.1079/BJN19880087 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1079/BJN19880087 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Bonhomme-Florentin A. L.A. CNRS n° 138, Groupe de Zoologie et Protistologie, les Cézeaux, BP 45, 63170 Aubiere, and Laboratoire de Zoologie, U.F.R. Sciences, BP 347, 51062 Reims-Cédex, France NATIONALLICENCE 773 0- British Journal of Nutrition Cambridge University Press 60/1(1988-07), 185-192 0007-1145 60:1<185 1988 60 BJN CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge