AGRICULTURE: JOHNS AND JONES 
367 
It will be seen that the greatest difference between these two globu- 
lins is in the percentage of sulphur, which is nearly three times as great 
in conarachin as in arachin. Another marked difference between these 
two proteins is shown by the figures representing the distribution of 
nitrogen as determined by the Hausmann method. The figures are as 
follows: 
N ARACHIN CONARACHIN 
Amide 2.03 2.07 
Humin 0.22 0.22 
Basic 4.96 6.55 
Non-basic 11.07 9.40 
Total , 18.28 18.24 
The high percentage of basic nitrogen in these proteins is most strik- 
ing and, as far as we know, conarachin contains more basic nitrogen 
than any other seed globulin yet examined. For the sake of compari- 
son, the percentages of basic nitrogen in proteins from some seeds com- 
monly used for foods are also given below.^ 
BASIC 
PROTEIN SOURCE NITROGEN 
Per cent 
Zein Maize 0.49 
Gliadin Rye 0.91 
Gliadin Wheat 1.09 
Phaseolin Kidney bean 3 . 62 
Vicilin Pea 4.92 
Arachin Peanut 4 . 96 
Legumin Pea 5.11 
Excelsin Brazil nut 5 . 76 
Edestin Hemp seed 5.97 
Globulin Cocoanut 6.06 
Conarachin Peanut 6.55 
Percentage of Basic Amino Acids in the Globulins of the Peanut. — Ara- 
chin and conarachin were hydrolyzed by boiling with 20% hydrochloric 
acid for twenty-four hours. The hydrolyzates were then analyzed by 
the Van Slyke method. The following results are corrected for the 
solubilities of the phosphotungstates of the bases: 
ARACHIN CONARACHIN 
Per cent Per cent 
Arginine 13.51 14.60 
Histidine 1.88 1.83 
Lysine 4.98 6.04 
Cystine 0.85 1.07 
The figures for cystine are undoubtedly too low as they represent only 
the cystine which escaped destruction during the hydrolysis of the pro- 
teins. Both proteins also gave a strong qualitative test for trypto- 
