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Centrin
Centrins, also known as caltractins, are a family of calcium-binding phosphoproteins found in the centrosome of eukaryotes. Centrins are present in the centrioles and pericentriolar lattice. Human centrin genes are CETN1, CETN2 and CETN3. Centrin was first isolated and characterized from the flagellar roots of the green alga ''Tetraselmis striata''. ==Function== Centrins are required for duplication of centrioles.〔 They may also play a role in severing of microtubules by causing calcium-mediated contraction. The majority of centrin in the cell is non-centrosomal whose function is not yet clear.
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