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...ng reason to change the spelling style, please first read Wikipedia:Manual of Style (spelling) and then begin a discussion on the talk page.--> | image_source = Structure of human hemoglobin. The protein's <font color = "red">'''α'''</font> and <fo

{{Redirect|Phy|the abbreviation for the physical layer of the OSI Model|PHY}} | pregnancy_category = Reduction of oxygen to unborn child due to depression of breathing