72 MACROMOLECULAR COMPLEXES 



TABLE 2C 



Availability of e-NH-j Groups to FDNB in Native Bone of Various Species 



OS a Function of Particle Size 



(Reacted for 48 hours) 



fjL mole 6-NHo Groups Available/g Collagen 



Bone Source Coarse Finely Powdered 



Ox 35 88 



Hen 82 116 



Calf 166 204 



Fish 216 267 



Embryonic chicken 263 323 



TABLE 2D 



Availability of e-NHo Groups to FDNB in Native Bone as a Function 

 of Time of Exposure and Particle Size 



/J. mole e-NHo Groups Available/g Collagen 

 Coarse Finely Powdered 



Bone Source 2 Days 2 Weeks 2 Days 2 Weeks 



Calf 161 200 203 229 



Fish ( a ) 216 267 247 273 



(b) 193 244 313 312 



TABLE 3A 



Availability of Guanidino Groups of Arginine in Bone Collagen to 

 Phosphotungstic Acid, as a Function of Mineral Content 



( Note that the mineral contents of the native undecalcified bone are 



approximately the same although they have markedly different densities, 



ox > fish.) 



