303 



phase relation with shortening, 



264 

 sensitivity of contractile elements 



to, 277 

 1' art ice I la myoneme, 265 

 Energy 



accumulation, 8, 137, 144-146 

 balance, 138, 144, 291 

 chemical, 1, 9, 10, 1 1, 173 

 conversion, 10, 100, 271, 272 

 dissipation by adjacent flagella, 



18, 51 

 distribution along fiagellum, 8, 9, 



173, 264, 286 

 enthalpy change, 20 

 expenditure, 11, 17-19, 59, 139, 



143, 144, 271, 290 

 free energy yield, 17, 18, 20 

 glycolytic, 17, 91 

 mechanical, 10, 11 

 mechanical, liberation by defor- 

 mation, 10, 173 

 motility, source for, 59, 89, 143, 



224 

 phosphate bond, 60, 234, 288 

 respiratory, 288 

 Engelhardt, V. A., 172, 202, 238, 



241, 251 

 Enzyme, 99, 100, 287; see also indi- 

 vidual enzymes 

 Epididymal fluid 

 calcium level, 75 

 freezing point depression, 63 

 ionic balance, 61, 63, 64 

 pH, 70, 79 



sperm motility, relation, 60, til 

 substrates, 61 

 Erythrocyte, 51 

 Esox sperm, 192 

 Estabrook, R. W., 101, 103 

 Ethylenediaminetetraacetate 

 chelating agent, 259 

 inhibition of flagellar ATPase, 

 239-240 



inhibition of flagellar swelling, 



241 

 inhibition of muscle ATPase, 



238-239 

 plasticizing agent, 259 

 sperm model reactivation, 259 



Fawcett, D. W., 147, 171, 286, 287 



Fertility, 71 



Fertilization, 39, 59, 99 



Fibroblast cell models, 253 



Fibrous sheath, 161-164, 287 

 alkaline phosphatase, 185 

 axial filament complex, relation 



to, 164 

 compressive element, 173 

 motility, relation to, 152, 164 

 solubility properties, 164 

 ultrastructure, 161-166, 287 



Fish sperm 



acetylcholinesterase, 178, 246-248 

 ATPase activity, 234-236 

 flagellar gel, 203-214, 238 

 flagellar volume changes, 241- 



244 

 glycolysis, 94 

 infrared absorption spectrum. 



200-201, 214 

 motility, 194-195 

 muscle-like proteins, 184, 221 

 relaxing factor, 236 

 respiration, 93-94 

 ultrastructure, 152, 159 

 x-ray diffraction patterns, 197- 



200, 214 

 Zo, value, 93 



Flagellar gel, 203-210, 291-292 

 birefringence, 204, 205 

 fine structure, 205-207 

 myosin coprecipitation, 210-213 

 oscillation characteristics, 207- 



209, 210, 214, 221-222 

 oscillation requirements, 201, 

 205, 222, 238 



