Did An Ancient Pathogen Reshape Our Cells?

The video explores the evolutionary history of the sugar molecule alpha gal, which is present in most mammals but absent in catarine primates, including humans. It discusses the hypothesis that a deadly pathogen led to the loss of alpha gal in our ancestors, allowing them to produce antibodies against it. This evolutionary change may have provided a survival advantage against certain pathogens. Modern experiments support this theory, showing that the loss of alpha gal can enhance pathogen resistance but may also lead to reproductive trade-offs.

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