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. Author manuscript; available in PMC: 2005 Sep 13.
Published in final edited form as: Eur J Biochem. 2004 Nov;271(21):4178–4188. doi: 10.1111/j.1432-1033.2004.04356.x

Fig. 8. Transformation of 7-DHC (1) to 7-DHP (2), followed by a proposed sequence for the enzymatic transformation of 7-DHP to its hydroxy derivatives (3–10), and/or to secosteroids (11–19) generated by the action of UVB radiation.

Fig. 8

3, 3β,11α- or β-Dihydroxypregna- 5,7-dien-20-one; 4, 3β,17β-dihydroxypregna-5,7-dien-20-one; 5, 3β,21-dihydroxypregna-5,7-dien-20-one; 6, 3β,17β,21-trihydroxypregna- 5,7-dien-20-one; 7, 3β,11α- or 11β,21-trihydroxypregna-5,7-diene- 20-one; 8, 3β,11α- or 11β,17-trihydroxypregna-5,7-diene-20-one; 9, 3β,11α-or β,17β,21-tetrahydroxypregna-5,7-dien-20-one; 10, 3β,20αor β-dihydroxypregna-5,7-diene; 11, 5Z,7E-3β-hydroxy-9,10-secopregna- 5,7,10(19)trien-20-one; 12, 5Z,7E-3β, 11α- or β-dihydroxy- 9,10-secopregna-5,7,10(19)trien-20-one; 13, 5Z,7E-3,17β-dihydroxy- 9,10-secopregna-5,7,10(19)trien-20-one; 14, 5Z,7E-3,β,21-dihydroxy- 9,10-secopregna-5,7,10(19)trien-20-one; 15, 5Z,7E-3β,17β,21-trihydroxy- 9,10-secopregna-5,7,10(19)trien-20-one; 16, 5Z,7E-3β,11α- or 11β,21-trihydroxy-9,10-secopregna-5,7,10(19)trien-20-one; 17, 5Z,7E- 3β,11α- or 11β,17-trihydroxy-9,10-secopregna-5,7,10(19)trien-20-one; 18, 5Z,7E-3β,11α- or β,17β,21-tetrahydroxy-9,10-secopregna- 5,7,10(19)-trien-20-one; 19, 5Z,7E-3β,11α- or β-dihydroxy-9,10-secopregna- 5,7,10(19)triene.