Menadione (Vitamin K3) is an over-the-counter (OTC) drug used in the treatment of abdominal cramps, colitis, diarrhea, hay fever, hemorrahage, hypoprothrombinemia, and joint pains. In this study, we evaluated the protective influence of protocatechuic acid on menadione-induced
The anaerobic parasite Giardia lamblia, causative agent of persistent diarrhea, contains a family of nitroreductase genes most likely acquired by lateral transfer from anaerobic bacteria or archaebacteria. Two of these nitroreductases, containing a ferredoxin domain at their N-terminus, NR1, and
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