Two polypeptides antigenically related to mammalian HMG1/2 have been detected in the yeast Saccharomyces cerevisiae. One exhibits an electrophoretic mobility in the range of mammalian HMG1/2 whereas the second polypeptide comigrates with yeast HMG S4. Evidence for the presence of HMG14/17 in yeast has not been obtained by immunological or nuclease digestion-based methods, although their presence cannot be excluded.
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