Abstract
THE N blood group system of pigs has been identified by Hála and Hojný1 by means of an antiserum called anti-Na. The corresponding antigen, Na, was considered to be the product of a gene, Na. They describe a system of two alleles, Na and N(c∣l)—the latter symbol denotes the absence of Na. Two additional factors of the N system, Nb and Nc, defined by the antisera anti-Nb and anti-Nc, have been identified in this laboratory. Inheritance studies show that there are three genes: Na, producing factor Na, Nb, producing factor Nb, and Nbc, producing factors Nb and Nc. Na and Nb are a pair of contrasting alleles, forming a closed system; Nc is a sub-group of Nb, and has not been found in its absence. It was not possible to verify Hála and Hojný's claim that Na is a soluble antigenic substance.
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References
Hála, K., and Hojný, J., Folia Biologica (Praha), 10, 239 (1964).
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SAISON, R. N Blood Group System of Pigs. Nature 211, 768 (1966). https://doi.org/10.1038/211768a0
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DOI: https://doi.org/10.1038/211768a0
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