protofilament

<cell biology> One way of viewing microtubule structure is to consider it to be built of (usually) 13 protofilaments arranged in parallel. ... (18 Nov 1997) ...
Found on http://www.encyclo.co.uk/local/20973

protofilament

Type: Term Pronunciation: prō′tō-fil′ă-ment Definitions: 1. Basic element of a contractile flagellar microtubule, approximately 5 nm thick.
Found on http://www.medilexicon.com/medicaldictionary.php?t=73129