2i6 BIOLOGICAL CHEMISTRY 



Tyrosine reaction, 22 Urochrome, 189 



Uroerythrin, 189 

 Unsaturated fatty acids, 12 



Urea, 18, 181 Vapour pressure, 29 



Uric acid, 183 Vitamins, 152 



Urine, 179 et seq. 



* se ' 



pigments of, 189 



reaction of, 180 Xanthoproteic reaction, 21 



sulphur in, 188 



Uriniferous tubule, 177 Zymase, 201 



Urobilin, 189 Zymoids, 73 



Printed in Great Britain by Butler & Tanner, Frome and London 



