When increasing amounts of AC are added to peanut extract,
the protein is progressively adsorbed and removed from solution.
When sufficient AC is added, the soluble protein becomes
undetectable. Figure 2 indicates that peanut proteins are adsorbed
with equal efficiency at pH 2 and 7 and are completely removed
from solution by an AC/protein ratio of approximately 80:1.
These findings corroborate our previously published results using
a peanut protein mixture prepared from defatted peanut flour
(20). This suggests that AC could quantitatively adsorb soluble
allergenic peanut protein whether encountered in the stomach
(pH 2) or intestine (pH 7).