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Ring 18 Ring 18 is a genetic condition caused by a deletion of the two tips of chromosome 18 followed by the formation of a ring-shaped chromosome. It was first reported in 1964.〔Gropp et al (1964). Multiple congenital anomalies associated with a partially ring-shaped chromosome probably derived from chromosome no. 18 in man. Nature 202:829-30.〕 ==Nomenclature==
The phrase “ring 18” refers to the shape that the normally linear chromosome assumes when one tip of the chromosome joins the other. A ring-shaped chromosome is the result. In the case of ring 18, one of the two copies of chromosome 18 has formed a ring.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Ring 18」の詳細全文を読む
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