Secosteroid: Difference between revisions
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[[Image:Ergocalciferol.svg|thumb|[[Ergocalciferol]] (vitamin D{{ssub|2}})]] |
[[Image:Ergocalciferol.svg|thumb|[[Ergocalciferol]] (vitamin D{{ssub|2}})]] |
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[[Image:Trimethyl steroid-nomenclature.svg|thumb|right|250px|Steroid skeleton. Note how the "B" ring is broken in vitamin D.]] |
[[Image:Trimethyl steroid-nomenclature.svg|thumb|right|250px|Steroid skeleton. Note how the "B" ring is broken in vitamin D.]] |
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A '''secosteroid''' is a molecule similar to a [[steroid]] but with a "broken" ring. The word is from verb {{lang-lat|secare}} = to cut,<ref>{{cite book|last=Ayers|page=241}}</ref> - {{lang-lat|stere}} "solid, three |
A '''secosteroid''' is a molecule similar to a [[steroid]] but with a "broken" ring. The word is from verb {{lang-lat|secare}} = to cut,<ref>{{cite book|last=Ayers|page=241}}</ref> - {{lang-lat|stere}} "solid, three-dimensional",<ref>{{cite book|last=Ayers|page=129}}</ref> - oid, from {{lang-grc|ειδος, ''eidos''}} "form".<ref>{{cite web|title=Online Etymology Dictionary|url=http://www.etymonline.com/index.php?term=-oid|accessdate=February 20, 2013}}</ref> |
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Secosteroids are very similar in structure to steroids except that two of the B-ring carbon atoms (C9 and 10) of the typical four steroid rings are not joined, whereas in steroids they are. |
Secosteroids are very similar in structure to steroids except that two of the B-ring carbon atoms (C9 and 10) of the typical four steroid rings are not joined, whereas in steroids they are. |
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Revision as of 23:59, 24 February 2014
A secosteroid is a molecule similar to a steroid but with a "broken" ring. The word is from verb Template:Lang-lat = to cut,[1] - Template:Lang-lat "solid, three-dimensional",[2] - oid, from Template:Lang-grc "form".[3]
Secosteroids are very similar in structure to steroids except that two of the B-ring carbon atoms (C9 and 10) of the typical four steroid rings are not joined, whereas in steroids they are.
In humans, a well known secosteroid is vitamin D.
References
Bibliography
Ayers, Donald (1972). Bioscientific Terminology. Tucson: University of Arizona Press. ISBN 978-0-8165-0305-6.
External links
- Secosteroids at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
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