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. 2002 Jul 2;87(2):212–217. doi: 10.1038/sj.bjc.6600353

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Copyright © 2002 Cancer Research UK

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Intron 4 group variants. The invariant segment (with 11 motifs) is approximately 600 bp. The two common deletion variants are described here as type I and type II, and lack 5 or 8 motifs, respectively. The larger size variants are characterised by insertion of several motifs.