Pravtcheva DD, Ruddle FH. X chromosome-induced reversion of chromosome segregation in mouse/Chinese hamster somatic cell hybrids. Cellular recognition of native and foreign X chromosomes.
Exp Cell Res 1983;
146:401-16. [PMID:
6683659 DOI:
10.1016/0014-4827(83)90142-8]
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Abstract
The direction of chromosome loss in two sets of mouse-Chinese hamster hybrids was compared with the direction of segregation of the same hybrids, to which an additional X chromosome derived from either of the mouse sarcoma lines MethAa, MethAs, or CMS4, was introduced at the time of the fusion. The addition of the X chromosome was carried out by substituting in place of the Chinese hamster parent a mouse X containing microcell hybrid of the latter. It was found that the addition of an X chromosome reverses the direction of chromosome segregation, but it can do so only if the mouse parent in the hybridization is different from the line from which the X originated. The possible reasons for recognition by the cells of a native and a foreign X are discussed. The existence of a multigene family on the X chromosome, involved in this recognition, is proposed.
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