Thin-layer chromatogram of various arabinoxylans and an arabinan before (controls) and after exposure to purified ArfI. Lanes 1 and 19, xylose, xylobiose, xylotriose, xylotetraose, and xylopentaose xylooligosaccharide standards; lanes 2 and 18, arabinose standard; lane 3, rye arabinoxylan plus ArfI; lane 4, rye arabinoxylan control; lane 5, wheat arabinoxylan plus ArfI; lane 6, wheat arabinoxylan control; lane 7, sugar beet arabinan plus ArfI; lane 8, sugar beet arabinan control; lane 9, arabinose and xylose standards; lane 10, CCXA plus ArfI; lane 11, CCXA control; lane 12, CCXB plus ArfI; lane 13, CCXB control; lane 14, CCX plus ArfI; lane 15, CCX control; lane 16, oat spelt arabinoxylan plus ArfI; lane 17, oat spelt arabinoxylan control. A, arabinose; X1, xylose; X2, xylobiose; X3, xylotriose; X4, xylotetraose; X5, xylopentaose.