Outer arm structure present on the outer doublet microtubules of ciliary and flagellar axonemes. Outer dynein arms contain 2-3 heavy chains, two or more intermediate chains and a cluster of 4-8 light chains. Inner and outer dynein arms have different functions in the generation of microtubule-based motility. [GOC:BHF, GOC:vk, PMID:2557057, PMID:6218174]
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C5: Ontology GO: Gene Ontology GO:CC: GO Cellular Component