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This chemically reactive form was then tailored to interact with an enzyme abundant in cancer cells, known as thioredoxin reductase.

They found that the vast majority of bacteria had little to no reductase enzymes, but certain groups of bacteria expressed dozens to hundreds of these enzymes.

That’s because the research team found that bilirubin reductase is present in almost all healthy adults.

These exciting results show that S-nitroso-coenzyme A reductase acts in vivo in mammals to control nitric oxide signalling, which is the third major discovery of the study.

People with a condition called 5-alpha reductase deficiency have a genetic mutation that leads them to produce low levels of DHT.