TABLE 4.

Potential metabolites detected in extracts of cell suspensions incubated with naphthalene

Strain	Potential metabolite detecteda						% of 1,2-DHDN labeled with the indicated no. of 18O atomsb
	Catechol	Gentisate	Salicylate	Salicylald.	1,2-DHN	1,2-DHDN	0c	1d	2e
P. putida G7	+	BD	+	+	+	+	66	11	22
C. testosteroni GZ42	BD	+	+	+	+	+	—
Hg1	BD	BD	+	BD	+	+	46	9	45
Hg2	+	BD	+	BD	+	+	55	9	36
Hg3	+	BD	+	BD	+	+	—
Hg4	+	BD	+	+	+	+	45	9	46
Hg6	+	BD	+	+	+	+	—
Hg8	+	BD	+	+	+	+	55	10	35
Hg11	BD	+	+	+	+	+	—
Hg12	+	BD	+	BD	+	+	62	10	28

^a+, detection; BD, below detection. Salicylald., salicyladehyde; 1,2-DHN, 1,2-dihydroxynaphthalene.

^bMass spectrometry determined the distribution of ¹⁸O within 1,2-DHDN parent ions produced under an atmosphere of 50% ¹⁸O₂-50% ¹⁶O₂. —, not determined.

^c1,2-DHDN mass contained two ¹⁶O atoms. Molecular ion = M.

^d1,2-DHDN mass contained one ¹⁶O atoms and one ¹⁸O atom. Molecular ion = M + 2.

^e1,2-DHDN mass contained zero ¹⁶O atoms and two ¹⁸O atoms. Molecular ion = M + 4.