Comparison of physical properties of W4 fiber with those of other artificial and natural spider silk fibers.

Properties of the recombinant AcSp1 (aciniform) fiber, which was formed from protein W4, were determined in this study. Properties of the recombinant MaSp1 (dragline) fiber, which was formed from protein 4RepCT, were obtained from [29]. Properties of the fiber formed from native sized MaSp1 (dragline) protein were obtained from [5]. Properties of natural aciniform silk were obtained from [25].