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Actin

Actin

(Science: cell biology) a filamentous proteins (42 kD) involved in muscle contraction in both smooth and striated muscle and also serves as an important structural molecule for the cytoskeleton of many eukaryotic cells.

It is the main constituent of the thin filaments of muscle fibres. The filaments (known also as filamentous or f-actin) can be dissociated into their globular subunits; each subunit is composed of a single polypeptide 375 amino acids long. this is known as globular or g-actin. in conjunction with myosin, actin is responsible for the contraction and relaxation of muscle.

See: myosin. One of the proteins into which actomyosin can be split; can exist in either a globular or a fibrous form.A protein found in the muscles of organisms that is initiated by atp to allow contraction of a [[muscle.


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Re: PCR & Agarose gel electrophoresis

... If the water was contaminated with such a plasmid and your DNA extraction didn't work properly, this could be an explanation. Did you do a beta-actin or other houskeeping-gene control? If this worked your extracted DNA should be fine. How often did you repeat the experiment? Can you outrule ...

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by apolll
Sun Aug 23, 2009 8:40 pm
 
Forum: Molecular Biology
Topic: PCR & Agarose gel electrophoresis
Replies: 3
Views: 120

Re: sliding filamen

are the actin and myosin filiments locked in place during a muscle cramp, if they are is it because there is no ATP and if thats not true, what is causing the muscle to cramp? Thankyou

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by didgi
Sun Jul 26, 2009 4:33 pm
 
Forum: Human Biology
Topic: sliding filamen
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Food and DNA

... they were encoded by DNA, of course). That is, if you eat for example meat, most of the protein are contractile components of a muscle, namely actin, myosin and such, which are not directly associated with DNA. DNA itself typically contains certain structural proteins such as histones and some ...

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by biohazard
Wed Jun 24, 2009 1:12 pm
 
Forum: Genetics
Topic: Food and DNA
Replies: 1
Views: 152

MOTOR PROTIENS

Which actin binding proteins regulate striated muscle? Anyone knows the answer to this?

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by Lurrena
Tue Mar 24, 2009 4:42 pm
 
Forum: Cell Biology
Topic: MOTOR PROTIENS
Replies: 1
Views: 365

Re: Molecules WITHIN cells

Thanks! Yes even though there is a lot of actin involed in the cytostructure I do believe that water is the most dominant molecule in a cell

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by twiiistCH
Wed Mar 11, 2009 4:51 pm
 
Forum: Molecular Biology
Topic: Molecules WITHIN cells
Replies: 3
Views: 421
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