Preliminary purification and partial characterization studies of a low-molecular weight cytosolic lead-binding protein in liver of the channel catfish (Ictalurus punctatus)

  • Conner E
  • Fowler B
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Abstract

The present study reports the isolation and partial characterization of a lead-binding protein (PbBP) in the liver of the channel catfish (Ictalurus punctatus). The protein has a molecular weight of 10 kDa as determined by SDS polyacrylamide gel electrophoresis and contains relatively large amounts of glycine (18.3%), aspartic acid (10.2%) and serine (15.1%). Western blot studies conducted using polyclonal antibodies to the rat renal PbBP and metallothionein (MT) showed no cross-reactivity, suggesting that the fish hepatic protein is immunologically distinct from these low-molecular weight metal-binding proteins in mammals. © 1994.

Author-supplied keywords

  • Channel catfish
  • Lead
  • Liver
  • Metal-binding protein

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Authors

  • Elizabeth A. Conner

  • Bruce A. Fowler

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