这个词是什么意思？
A group of atoms or molecules attached to other molecules or cellular structures and used in studying the properties of these molecules and structures. Radioactive DNA or RNA sequences are used in MOLECULAR GENETICS to detect the presence of a complementary sequence by NUCLEIC ACID HYBRIDIZATION.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D015335 · MeSH 2026。
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