Now we can actually see a real picture of a hydrogen bond between ... used a similar method in May to capture the first images of covalent bonds which link atoms together into molecules.

The slideshow shows how a covalent bond forms between a hydrogen atom and ... Some electron microscopes can produce images of atoms and simple molecules.

Lysine target engages with an irreversible inhibitor. The reactive ArNASA group chemically reacts with the protein's amino acids to form a covalent bond, irreversibly inhibiting protein activity.