Image of zebrafish By Pogrebnoj-Alexandroff from Wikimedia Commons
We tend to think of carbon monoxide (CO) only in terms of being a poisonous gas. The reason for its toxicity is due to its ability to bind really tightly to our hemoglobin molecules, which prevents oxygen from being able to bind. In mammals, CO also decrease breathing rate. As you can imagine, it is a pretty terrible gas to breath in when you are a species dependent on hemoglobin for delivery of oxygen to tissues.
Did you know that CO is also produced in our bodies when heme molecules are broken down by enzymes called…
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