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. Author manuscript; available in PMC: 2010 Jul 1.
Published in final edited form as: J Struct Biol. 2009 Mar 9;167(1):47–54. doi: 10.1016/j.jsb.2009.03.001

Figure 6. Calculated strain of preCol domains during thread elongation.

Figure 6

This graph illustrates the predicted strain of the combined flanking and His-rich domains of a single preCol-NG or -D molecule during thread extension assuming a series model of preCol alignment and based on the calculated resting length of each. Horizontal dashed lines represent calculated maximal extension strains for the flanking/His-rich domains of preCol-NG and -D. The thread strain value at which the calculated molecular strain crosses the respective dashed line (indicated by a dashed circle) denotes the maximum possible thread strain following unraveling of the folded flank/His-rich domain of each particular preCol variant. Since threads are extensible to ∼100% strain, these calculations indicate that the extension of preCol domains can account half of this value. This suggests that higher order hierarchical structures must also play a role. The collagen strain calculated from the WAXD results is also included in the figure.