How did Karl Landsteiner introduce Linus Pauling to immunochemistry?

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Linus Pauling was introduced to the field of immunochemistry by Karl Landsteiner after the two met during one of Pauling's visits to see the biochemist Alfred Mirsky in New York.1

Landsteiner, a Nobel laureate renowned for his discovery of blood groups, became a guide for Pauling in this area of study. Pauling was particularly fascinated by the specificity of antibody–antigen reactions. This mentorship influenced Pauling to develop a theory explaining that this biological specificity was the result of a unique folding of the antibody’s polypeptide chain.12