Involved in the high-affinity L-arabinose membrane transport system. Binds with high affinity to arabinose, but can also bind D-galactose (approximately 2-fold reduction) and D-fucose (approximately 40-fold reduction). Induced by arabinose. Transcription is dependent on the transcription factor AraC, the cAMP receptor protein (CRP) and cAMP. Belongs to the bacterial solute-binding protein 2 family.