Involved in the type II arabinogalactan (AG) side chains degradation (PubMed:30564851). Releases arabinofuranose (Araf) from alpha-1,3-Araf-substituted beta-1,6-galactooligosaccharides (PubMed:30564851). Can use radish root AGP, larch AG and arabinan. Shows weaker activity with gum arabic and arabinoxylan (PubMed:30564851). Hydrolysis of terminal non-reducing alpha-L-arabinofuranoside residues in alpha-L-arabinosides. kcat is 220 sec(-1) with larch arabinogalactan as substrate. Optimum pH is 5.5 with larch arabinogalactan as substrate. Optimum temperature is 50 degrees Celsius with larch arabinogalactan as substrate. Belongs to the glycosyl hydrolase 43 family.