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Abstract
The level of retinol-binding protein (RBP) was determined by a single radial immunodiffusion technique in the serum of patients with retinitis pigmentosa (RP) carefully classified according to their specific genetic type, i.e., autosomally recessive, dominant, sex-linked, and other such as those forms associated with Laurence-Moon-Bardet-Biedl or Winkelman's disease. Highly purified human normal RBP was used as a standard. In none of the patients with RP studied was the serum level of RBP found to be significantly different from that of the control subjects.