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Extra G positive band on the long arm of chromosome 9.
  1. L A Knight,
  2. G M Soon,
  3. M Tan
  1. Cytogenetics Department, Singapore General Hospital.

    Abstract

    Various heteromorphisms of the 9q heterochromatic area have been reported. In most instances, the extra G positive band is accompanied by an extra C band. We describe a family where the extra G band is totally euchromatic and does not include an extra C band. It is not clear whether these two types of variant chromosome 9 arose from a similar mechanism.

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