The variation in strength of the human blood group P

@article{Fisher1953TheVI,
  title={The variation in strength of the human blood group P},
  author={Ronald Aylmer Sir Fisher},
  journal={Heredity},
  year={1953},
  volume={7},
  pages={81-90}
}
  • R. Fisher
  • Published 1 April 1953
  • Medicine
  • Heredity
SOON after their discovery (i) of the blood group known by the genetical symbols F, p, Landsteiner and Levine called attention to the great variability of the P reaction with anti-P sera. This variability has proved very troublesome, and for some years the validity of estimates of gene frequencies was in some doubt, owing to the possibility that an unknown proportion of weak positive reactions were passing as negative. Moreover, there is still no anti-p reagent to supplement the typing antibody… 
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With a method similar to that employed for the detection of M, namely, suitable absorption of certain rabbit immune sera for human blood, two other agglutinable qualities were found which may be denoted as N and P.
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