Biology
actin
Term: actin
Literally meaning: ? ray?
Origin: Anc Greek
'á????, -[é???/ actis(=ray) > (genitive) ???????/actinos
+(-???)/-in, chemical ending that forms feminine nouns such as feminine French suffix: ?ine)
Coined/History
Actin was extracted first time from muscle by British physiologist W.D.Halliburton (1860-1887), in 1887. The protein was isolated in a pure form in 1942 by Hungarian Bruno F Straub (1914-1996) and named as actin by Szent-Gyorgyi (1893-1986) in 1945. Szent-Gyorgyi demonstrated that actin with myosin are responsible for muscular contraction, and showed that the ATP is the immediate source of energy in muscle contraction.
Source
Halliburton, W.D. (1887). ?On muscle p[lasma? J Physiol. 8 (3-4): 133.
Szent-Gyorgyi, A. 1945. ?Studies on muscle.? Acta Physiol Scandinav 9 (suppl. 25)..
Definition
Actin is a globular (42-kDa) and highly-conserved protein found almast in all eukaryotic cells. Actin is the monomeric subunit of microfilaments and thin filaments playing a major role in many cellular processes such as cytokinisis, cell molity and muscle contraction.
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Actin
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Tropomyosin
Term: tropomyosin Literally meaning: ?that which is turned in muscle?Origin: Anc Greek+-??????/tropos(=suffix denoting way, habit, direction or tendency) >?????/trepo(=turn)+???-/myo-(=combining form meaning muscle) > ???/mys/ (=muscle) > ???/myo(=enclosed...
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Troponin
Term: troponin Literally meaning: ?that which is turned?Origin: Anc Greek+-??????/tropos(=suffix denoting way, habit, direction or tendency) >?????/trepo(=turn)Coined/HistoryIn 1965 a protein was found which promoted aggragation of tropomyosin. In...
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Locomotion And Movement
Click here for PDFLocomotion is the voluntary movements resulting in a change in location.Types of movement in human being· Amoeboid movement: By pseudopodia. E.g. Macrophages, leucocytes, cytoskeletal elements like microfilaments etc.· Ciliary...
Biology