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prealbumin

prealbumin Biochem.
  (priːˈælbjʊmɪn, -ælˈbjuːmɪn)
  [pre- B. 3; so called because it appears slightly in front of albumin during electrophoresis.]
  A plasma protein with an electrophoretic mobility slightly greater than that of albumin; spec. a tetramer in human blood which binds thyroxine and the retinol-binding protein.

1955 O. Smithies in Biochem. Jrnl. LXI. 634/2 The two components migrating more rapidly than the broad albumen zone are referred to as the pre-albumins1 and 2 (1 indicating the faster-moving component). 1959 Nature 3 Oct. 1067/2 (heading) Separation of prealbumins by starch gel electrophoresis. 1975 F. W. Putnam Plasma Proteins (ed. 2) I. ii. 72 Prealbumins have been described in other species such as the mouse; the molecular weight is only about 20,000 and the function is unknown. 1976 Sci. Amer. Sept. 58/2 When dietary protein intake is deficient, the two proteins that play a role in the transport of vitamin A (retinol-binding protein and prealbumin) are not made by the liver in adequate amounts.

Oxford English Dictionary

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