Figure 4: Extraction samples from left to right: tooth in (A) 50% 0.5 M HCl /50% DI Water, (B) 0.5 M HCl, (C) 50% 0.2 M Tris Buffer/50% DI Water, (D) 0.2 M Tris Buffer, femur shaft in (E) 6.0 M Urea, (F) 0.5 M HCl, (G) 0.2 M Tris Buffer, femur head in (H) 6.0 M Urea, (I) 0.5 M HCl, (J) 0.2 M Tris Buffer, and tooth in (K) 6.0 M Urea.