464 CHEMISTRY OF THE PROTEIDS CHAP. 2 



Bacteria. In bacteria Galeotti 1 found a nucleo-proteid, and 

 according to Stutzer, 2 4075 per cent of the nitrogen in moulds ii 

 nuclein-nitrogen. 



Higher Plants. Osborne and Harris 3 prepared a nucleic acic 

 from wheat-embryos, which they called tritico-nucleic acid, and whicl: 

 they investigated very thoroughly. Its composition- and decompose 

 tion-products are given on p. 440. It is strongly dextro-rotatory, th< 

 rotation varying according to its concentration from + 66 to + 74. 4 



Petit 5 isolated from barley an iron-containing nuclein, which con 

 tained no sulphur, and which did not give Millon's reaction. 



Klinkenberg 6 obtained from different food-stuffs, poppy-seed- and 

 palm-cakes, nucleo-proteids and nucleins which in their composition 

 resemble those of yeast. 



Ordinary parts of plants rich in cells are also rich in nucleic 

 acid. Kovchoff 7 found an increase in the amount of nucleo-proteids 

 whenever plants formed new tissue as the result of injury. 



1 G. Galeotti, Zeitschr. f. physiol. Chem. 25. 48 (1898). 



2 Stutzer, ibid. 6. 572 (1882). 



3 T. B. Osborne and J. F. Harris, ibid. 36. 85 (1902) ; also in Journ. Amer. 

 Chem. Soc. 22. 379 (1899). 



4 T. B. Osborne, Amer. Journ. of Physiology, 9. 69 (1903). 



5 P. Petit, Compt. rend. 116. 995 (1893). 



6 V- Klinkenberg, Zeitschr. /. physiol. Chem. 6. 155, 566 (1882). 



7 J. Kovchoff, Ber. d. deutsch. botan. Ges. 21. 165 (1903). 



[TABLE 



