Figure 3. Submicroscopic structure of a junction of collagen fibrils.

(a) Thermal Noise image of a junction of two collagen fibrils, which are sketched in green to guide the eye. Axis cues are 200 nm in length. For a view from multiple angles; see Supplementary Movie 1. (b) Slice through the cumulative occupancy perpendicular to fibril 2 at the position of fibril 1. The channel formed by fibril 1 is ∼160 nm above the channel formed by fibril 2 (Scale bar, 500 nm). This indicates that fibril 2 had a diameter of about 160 nm if the two fibrils lie on top of each other (c).