314 



SUBJECT INDEX 



Proline, and chain configuration 193, 

 196 



— in feathers 163 

 Pronghorns 67 



Prosthetic groups, absent in keratins 



161 

 Protein(s), corpuscular and structural 



2 



— fibre synthesis, classification of 1 22 



(Fig. 52) 

 - — • synthesis, cytology of 108, 116, 

 120, 121 



in epidermal systems 108 et seq., 



131 



in hair cortex 112 



synthesis theories of 109 et seq. 



a-proteins other than keratins 202 



et seq. 

 Proteus vulgaris and Bacillus subtilis, 



X-ray pattern of flagella 3, 202 

 Protofibrils 125 

 Pycnosis of nuclei 4, 263 



Radio sulphur, incorporation into nuclei 



in keratinizing cells 220 

 Rana, tail epithelium 90 et seq. 

 Rat and mouse hair, zig-zags in 156 

 Reduction of wool 236 et seq. 

 Regenerated keratins 166, 237, 238 

 Relation between a-helices, a-filaments 



and fibrils 186 (Figs. 79, 80) 

 Relaxation of hairs and wool fibres 255 

 Renewal time(s) 1 34 



— for epidermal tissues 135 (Table 6) 

 Residues remaining after chemical 



extraction of keratins 270 

 Resistant membranes in keratinized 



tissues 262, 270 

 Retaining cells, definition 112, 114, 



120 



— comparison with secreting cells 



113 (Fig. 50) 

 Reticulin 53 



Rhythmic activity, generated by feed- 

 back 141, 145 (Fig. 60) 



— changes in shape and composition 

 of crimped wool fibres 156 



Ribonucleic acid (RNA), and protein 

 synthesis 109 et seq. 



Ribonucleic acid granules, fate of in 

 keratinizing tissues 264 



— in basal layer cells 80, 81 

 as ribosomes 81 



— in hair follicle 219, 220 (Fig. 97) 

 Ribosomes (RNA) (particles) 46, 111, 



112 



— in basal layer cells 81 



— in hair cortex 112, (Plate 11) 

 Rubber-like properties, of hairs 255, 



256 



— of reduced hairs 258 



Salt bridges, stabilization by 234 



— linkages and elasticity 251, 253 

 (Fig. 106) 



Scale-hair-gland complex 77 (Fig. 34), 



78 

 Scale(s) 66, 67 (Fig. 28) 



— embryology of 67 



— of fish 66, 75 



— of snakes 106 



- — (reptilian) structure 67 (Fig. 28) 



— types of keratin in 67, 104 

 Schmitt's hypothesis for development 



of columnar epithelia 99 (Fig. 44), 



100 

 Sebaceous glands 59 

 Secondary and tertiary structures in 



proteins 119 

 Secreted keratins in birds 79, 107 



(Plates 18 and 19) 

 Secretion of proteins 112 et seq. 

 Secretory cells, cytology of 110 (Fig. 



49), 113, 114 

 Setting of hairs 259, 260 

 Seven-stranded cable for a-proteins 5, 



184, (Fig. 78) 

 Shrinkage of woollens 73 

 Sickle tips of primary fibres 150, 159 

 Silk and /?-keratin patterns compared 



172 



— fibroin 121 



— formation of fibrils 129 



— structure of 179, 180 



— glands 203 



Soft keratinization 64, 95, 97, 228 

 et seq. 



Soluble derivatives of keratinized tis- 

 sues 236 et seq. 



