Abstract
Summary
Methotrexate-induced megaloblastic anemia led to altered proportions of Hbs I and II in the adult Peking duck and to the appearance of the 2 new hemoglobins which we have tentatively labeled Hbs “III” and “X.” One of these, Hb “III,” has electrophoretic and chromatographic properties indistinguishable from Hb III seen only in the embryo and duckling.
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