Iron can only bind oxygen when itās in the ferrous (Fe²āŗ) state. If it gets oxidized to ferric (Fe³āŗ), thatās methemoglobin ā and it canāt carry oxygen at all
Iron can only bind oxygen when itās in the ferrous (Fe²āŗ) state. If it gets oxidized to ferric (Fe³āŗ), thatās methemoglobin ā and it canāt carry oxygen at all