Assertion: microtubule's protofilament | /r/HasProperty | figure 1a
Facets:
Source sentences:
text: Within a MT, tubulin heterodimers are arranged in linear protofilaments (Figure 1a) that associate laterally to form 25 nm wide hollow cylindrical polymers.
text: The tubulin dimers assemble in a head-to-tail manner to form linear polymers called protofilaments (Figure 1B).