... residue at the reducing end and were: b- D-Galp-1,4-D-Glcp (b- D-Galp-1, 4-) < /b> 2D-Glcp (b- D-Galp-1, 4-) < /b> 3D-Glcp (b- D-Galp-1, 4-) < /b> 4D-Glcp (b- D-Galp-1, 4-) < /b> 5D-Glcp. Incubations were performed in duplicate. ... can be substituted with b- 1,6-linkedD-galactopyranose residues [1]. Both types canbe substituted with a) 1-, < /b> 3-linkedL-arabinofuranose chains.Type I arabinogalactan is degraded by b- 1,4-endogalacta-nase ... b- 1,4-endogalacta-nase and b- galactosidase. b- 1,4-Endogalactanases cleavewithin the galactan moiety of type I arabinogalactan,releasingD-galacto-oligosaccharides. Bacterial b- 1,4-endo-galactanases...