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M ring

M ring

(Science: biology, microbiology) Innermost (motor) ring of the bacterial flagellar base, located in the outer leaflet of the plasma membrane. It is this ring that is linked to the hook region (and thus to the flagellum itself) and that rotates. Composed of 16 or 17 subunits (one more or less than the s ring).


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Is thiamin (thiamine) amine or not?

... in the Merriam-Webster dictionary include dopamine and histamine, in both of which, amino group is attached to a carbohydrate chain, not to the ring. Yes, in thiamin, NH2 is attached directly to the ring.

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by boron
Fri Jan 23, 2015 11:08 am
 
Forum: Human Biology
Topic: Is thiamin (thiamine) amine or not?
Replies: 2
Views: 1526

Is thiamin (thiamine) amine or not?

From what it looks like to me, thiamine might not be an amine because the amino group is connected to an aromatic ring. I know phenylamines are amine groups connected to benzene rings. In thiamine, the amine group is connected to a pyrimidine ring. So I'm not sure but this may be ...

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by BasicBiology
Thu Nov 06, 2014 7:44 pm
 
Forum: Human Biology
Topic: Is thiamin (thiamine) amine or not?
Replies: 2
Views: 1526

Re: Any ideas for vaccine development or anti-viral drugs???

... (PMO) are a class of uncharged single-stranded DNA analogs modified such that each subunit includes a phosphorodiamidate linkage and morpholine ring. PMO antisense agents have been reported to effectively interfere with the replication of several positive-strand RNA viruses in cell culture. ...

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by jonmoulton
Mon Sep 15, 2014 3:04 pm
 
Forum: Cell Biology
Topic: Any ideas for vaccine development or anti-viral drugs???
Replies: 2
Views: 12592

Microevolution verus Macroevolution

... though, is speciation, and in fact there is a beautiful example of extinction and speciation in a single event, namely an extinction event in a ring species. If a selection of sub-species in the middle of the ring go extinct, by a bolide impact, for example, and the remaining subspecies are ...

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by hackenslash
Thu Mar 06, 2014 8:57 am
 
Forum: Evolution
Topic: Microevolution verus Macroevolution
Replies: 16
Views: 25954

Conflicting results of Gram-Negative unknown

... positive or pigment negative...not quite sure what that means. Has never been discussed in lab 6. Indole test *Negative RESULTS: No cherry red ring on top of liquid layer 7. Citrate test *VERY CONFLICTED ABOUT RESULTS, RESULTS: Positive indicator would be color change of the media from green-ish ...

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by Jrh21854
Sun Dec 01, 2013 8:25 pm
 
Forum: Microbiology
Topic: Conflicting results of Gram-Negative unknown
Replies: 0
Views: 3625
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