  Semiflexible polymers form central structures in biological material.
Modeling approaches usually neglect influences of polymer-specific molecular
features aiming to describe semiflexible polymers universally. Here, we
investigate the influence of molecular details on networks assembled from
filamentous actin, intermediate filaments, and synthetic DNA nanotubes. In
contrast to prevalent theoretical assumptions, we find that bulk properties are
affected by various inter-filament interactions. We present evidence that these
interactions can be merged into a single parameter in the frame of the glassy
wormlike chain model. The interpretation of this parameter as a polymer
specific stickiness is consistent with observations from macro-rheological
measurements and reptation behavior. Our findings demonstrate that stickiness
should generally not be ignored in semiflexible polymer models.
