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. 2007 Nov 21;94(6):2204–2211. doi: 10.1529/biophysj.107.111013

FIGURE 5.

FIGURE 5

Bending moduli of collagen type I fibrils as a function of diameter at ambient conditions (A) and in PBS buffer (B). Data points are of native collagen fibrils (filled squares) and collagen fibrils cross-linked by EDC/NHS (open squares). N = 18 for native collagen (at ambient conditions); N = 11 for cross-linked collagen (at ambient conditions); N = 12 for native collagen (in PBS buffer); and N = 13 for cross-linked collagen (in PBS buffer). The relative error in the bending modulus of every individual fibril is derived from the errors in fibril diameter (SEM measurements), the length of the channel, and the spring constant of the cantilever.