Thursday, September 29, 2011

A step back in time!!!

IN 1900, AN AUSTRIAN SCIENTIST NAMED KARL LANDSTEINER DISCOVERED THE BLOOD TYPES IN HUMANS. HE FOUND THAT WHEN RED BLOOD CELLS FROM DIFFERENT PERSONS  ARE MIXED, SOME INTERMINGLE WHILE OTHERS AGGLUTINATE OR CLUMP TOGETHER. HE ALSO FOUND THAT CERTAIN PROTEINS CALLED ANTIGENS ON THE MEMBRANE OF RED BLOOD CELLS CAUSE AGGLUTINATION.

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