Objective To explore the research progress of ringchromosome 13 syndrome.
目的探讨13号环状染色体综合征的进展。
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Result: The abnormal chromosome rate of bio-engineering cells muted by outer space were: ringchromosome, 10.5%; acenericfragment, 36.75%; triceneric and fourcentric, 13%.
Objective to search the forming cause and the correlation between the clinical phenotype and chromosome band by the cytogenetic analysis on a case of ringchromosome 21 syndrome.