interactions of horseradish peroxidase with propylthiouracil , thiouracil , propyluracil and uracil lead to the formation of complexes that exhibit different absorption spectra which can be attributed to the perturbation of peroxidase as the result of the drug-binding on a polar site in the protein .
C0033511
propylthiouracil
C0039957
thiouracil