[op-sin] /ˈɒp sɪn/

noun, Biochemistry.
any of several compounds that form the protein component of the light-sensitive retina pigment, rhodopsin.
the protein that together with retinene makes up the purple visual pigment rhodopsin

opsin op·sin (ŏp’sĭn)
A protein of the retina, especially the protein constituent of rhodopsin, that makes up one of the visual pigments.


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  • Opsiuria

    opsiuria op·si·u·ri·a (ŏp’sĭ-yur’ē-ə) n. A more rapid excretion of urine during fasting than after a full meal.

  • Opsinogen

    opsinogen op·sin·o·gen (ŏp-sĭn’ə-jən, -jěn’) n. A substance that stimulates the formation of opsonin. Also called opsogen.

  • Opsoclonus

    opsoclonus op·so·clo·nus (ŏp’sō-klō’nəs) n. Rapid, irregular, nonrhythmic movements of the eye in horizontal and vertical directions.

  • Opsogen

    opsogen op·so·gen (ŏp’sə-jən, -jěn’) n. See opsinogen.

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