Proposed pathway of d-xylose and l-arabinose degradation in Haloferax volcanii. l-KDA, l-2-keto-3-deoxyarabinonate; α-KGSA, α-ketoglutarate semialdehyde; d-KDX, d-2-keto-3-deoxyxylonate; XDH, d-xylose dehydrogenase; l-AraDH, l-arabinose dehydrogenase; XAD, xylonate dehydratase; KDXD, KDX dehydratase; α-KGSADH, α-KGSA dehydrogenase.