Proposed degradation pathways of alkyl ethers (R1, R2 = aliphatic), aralkyl ethers (R1 = H, R2 = phenyl, anisole; R1 = methyl, R2 = phenyl, phenetole), and dibenzyl ether (R1 = phenyl, R2 = benzyl) by a putative O-dealkylase activity from Rhodococcus sp. strain DEE5151. Spontaneous ether scission is schematized in the bracket according to a general acid-catalyzed mechanism of hemiacetal cleavage.