The percentage of $Se$ in peroxidase anhydrous enzyme is $0.5\%$ by weight (atomic weight $= 78.4$). Then,the minimum molecular weight of peroxidase anhydrous enzyme is:
- A$1.568 \times 10^4$
- B$1.568 \times 10^3$
- C$15.68$
- D$3.136 \times 10^4$
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