Figure 2. SEM images of crystals grown (a) without protein, in (b) 10% rM179, (c) 10%r M166, (d) 10% polyacrylamide gel, (e) 0.5% agarose gel, and (f) 10% albumin. Note that OCP crystals in a, d, e, and f show typical ribbon-like morphology, while the cylindrical and prismatic fibers grew only in amelogenin gels, regardless of the existence of the hydrophilic C-terminal of amelogenin.