. 2012 May;78(10):3560–3570. doi: 10.1128/AEM.00225-12

Table 1.

Mass spectral features of the butylboronate-derived metabolites produced from flavanone and flavone by BphAE-_B356, BphAE_LB400, and BphAE_p4

Substrate	No. of metabolites produced by:			Metabolite structure^a	Oxidized ring	M⁺	Other ions
Substrate	BphAE_B356	BphAE_LB400	BphAE_p4	Metabolite structure^a	Oxidized ring	M⁺	Other ions
Flavanone	2	1	2	2-(2,3-Dihydro-2,3-dihydroxyphenyl)chromane-4-one or 2-(3,4-dihydro-3,4-dihydroxyphenyl) chromane-4-one	B	324	308, 267, 240, 224, 147, 120
			2	4a,5-Dihydro-4a,5-dihydroxy-2-phenyl chromane-4-one	C	324	308, 267, 240, 224, 192, 176, 131
Flavone	2	1	2	2-(2,3-Dihydro-2,3-dihydroxyphenyl)chromene-4-one or 2-(3,4-dihydro-3,4-dihydroxyphenyl) chromene-4-one	B	322	306, 265, 238, 222, 210, 181, 120
			1	4a,5-Dihydro-4a,5-dihydroxy-2-phenyl chromene-4-one	C	322	306, 265, 238, 222, 192, 163, 129

Structures were tentatively identified on the basis of their mass spectral fragmentation features and on the orientation of the docked substrates in the enzyme catalytic pocket.