Sinh học - Chapter 4: Carbon and the molecular diversity of life

Enantiomers are molecules that are mirror images of each other. Enantiomers are possible if there are four different atoms or groups of atoms bonded to a carbon. If this is true, it is possible to arrange the four groups in space in two different ways that are mirror images. They are like left-handed and right-handed versions. Usually one is biologically active, the other inactive.