Converse of object

• know: V itamin B 12 is the only known essential biomolecule with a stable metal-carbon bond, that is, it is an organometallic compound.

Modifies a noun

• characterisation: The tolerance of this technique to contaminating substances renders it an extremely valuable tool in biomolecule characterisation.

• recognition: We have pioneered the use of supramolecular chemistry to design agents which are of similar size and shape to natural biomolecule recognition units.