| light a. |
adaptation of the eye to vision in the sunlight or in bright illumination (photopia), with reduction in the concentration of the photosensitive pigments of the eye; called also photopic a.
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| light b. |
exposure of all or part of the body to light rays, either of the sun or from an apparatus.
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| light c. |
any of the smaller polypeptide chains of antibody molecules, two identical light chains occurring (with two identical heavy chains) in each immunoglobulin monomer. There are two types, designated κ and λ, both occurring in all immunoglobulin classes (in a ratio of about two κ chains to one λ chain in humans). Light chains have two homology regions of about 110 amino acid residues: one variable region (VL) and one constant region (CL). Called also L c. See immunoglobulin.
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| light c.’s |
parafollicular c's.
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| light chain n. |
nephropathy caused by deposition of abnormal light chains (usually kappa chains but sometimes lambda chains) in renal basement membranes, often with glomerulosclerosis; it may be associated with a plasma cell dyscrasia such as multiple myeloma (see myeloma kidney, under kidney).
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