Protofilament Definition
    noun
  
 A filament of polymerized tubulin in a cell, which becomes part of a microtubule.
Wiktionary 
Other Word Forms of Protofilament
Noun
Singular:
 protofilamentPlural:
 protofilamentsOrigin of Protofilament
-  proto- + filament From Wiktionary 
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