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DNA strand orientation

The DNA strand orientation is by convention 5' → 3'.

This concept allows to determine, for a given gene, the gene orientation relative to the 5' → 3' DNA strand.

This concept is particulary important when a same sequence contains genes with different orientations.

The 'DNA strand orientation' concept is part of the 'ORIENTATION' axiom of IMGT-ONTOLOGY [1].

The two concept instances are exclusive:

[1] Giudicelli, V. and Lefranc, M.-P., Bioinformatics, 15, 1047-1054 (1999) PMID: 10745995, LIGM:221 pdf