Decaprenyl-phospho-arabinose (b-d-arabinofuranosyl-1-O-monophospho-decaprenol), the only known donor of d-arabinose in bacteria, and its precursor, decaprenyl-phospho-ribose (b-d-ribofuranosyl-1-O-monophospho-decaprenol), were first described in 1992.