Nucleolus Organizer Regions (NORs) Inserted in 6q15
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We studied a family in which three of the members present one chromosome 6 with an isochromatid gap at the band 6q15 level. Studies of the chromosomes by various banding techniques suggested that the secondary constriction represents a stalk from an acrocentric chromosome inserted into 6q15. The possible influence of the abnormal localization is considered.
A paternal t(6;22)(q25.3;p12) leading to a deleted and satellited der(6) in a short-lived infant.
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