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Costa

Any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates).costa
(Science: microbiology) rod shaped intracellular organelle lying below the undulating membrane of Trichomonas.
generates active bending associated with local loss of birefringence at the bending zone, probably as a result of conformational change in the longitudinal lamellae. Major protein approximately 90 kd.


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