《英文msh词典》Expansion,Trinucleotide Repeat
[入口词] Expansion,Trinucleotide Repeat
[主题词] Trinucleotide Repeat Expansion
[英文释义] An increased number of contiguous trinucleotide repeats in the DNA sequence from one generation to the next. The presence of these regions is associated with diseases such as FRAGILE X SYNDROME and MYOTONIC DYSTROPHY. Some CHROMOSOME FRAGILE SITES are composed of sequences where trinucleotide repeat expansion occurs.