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. 2003 Dec 11;100(26):15481–15485. doi: 10.1073/pnas.2633596100

Table 1. Helix parameters.

Form Pitch, μm Diameter, μm Handedness
Normal 2.3 0.4 Left
Semicoiled 1.1 0.5 Right
Curly-1 1.0 0.3 Right
Model normal 11 × 104 2.54 × 104 Left
Model semicoiled 6.4 × 104 2.54 × 104 Right and left

Approximate pitch, approximate diameter, and handedness for some polymorphic forms of flagellar filaments from ref. 2 and H. C. Berg and L. Turner, personal communication. We also include the dimensions of our model helices. For the models, the diameter is the diameter of the mandrel.