VOL. 12 (lQ53) PRECIPIT.VBILITY OF CELL CONSTITUENTS AND METABOLITES 



269 



LANTHANUM 



Amino acids or salts 



Precipitate 



Remarks 



Na hippurate 

 Tyrosine 

 Leucyltyrosine 

 Glycyltyrosine 

 Tryptophan 

 Acetyltryptophan 

 Arginine HCl 

 Lysine HCl 

 Histidine HCl 

 Asparagine 

 Na glutamate 

 Cysteine Na 

 Methionine 

 Glutathione Na 

 Witte-peptone 

 Silk peptone 



+ s. in excess of hippurate 



+ 



pH 6 to 7 



incompletely s. in excess of each of the reactants 



URANIUM' 



Na or K salts * 



Precipitate 



Remarks 



ppt. slowly, better on warming, s. in excess of suc- 

 cinate 



— ■ no ppt. even on warming 



ppt. jelly like 



s. in excess of benzoate 



dark brown color 



dark brown color and ppt. s. in excess of tannate 



only slight ppt. 



Mg salt used, s. in MNaPOg, K4P2O7, monoethanol- 

 amine metaphosphate 



s. in M NaPOg, K^PgO^, monoethanolamine meta- 

 phosphate 



s. in excess of adenosine-3-phosphate, s. in NH^ 

 citrate only on warming 



only slightly s. in excess of adenosine-5-phosphate ; 

 very s. in NH^ citrate 

 s. in NH^ citrate 



white ppt. ,s. in excess of ATP-Na; s. in NH^ citrate 

 with yellow color 



* used as Mjio solution of uranyl acetate. 

 '* used as Ml 10 or M/ioo solutions. 



Almost all ppt. are soluble in solutions of triammonium- or trisodium citrate. 



