Hexamethylenetetramine, commonly called hexamine and methenamine, is a heterocyclic organic compound with formula (CH₂)₆N₄.

Amino acids are molecules containing an amine group, a carboxylic acid group and a side chain that varies between different amino acids. These molecules are particularly important in biochemistry, where this term refers to alpha-amino acids with the general formula H2NCHRCOOH, where R is an organic substituent.

Formins (formin homology proteins) are a group of proteins that are involved in the polymerisation of actin and associate with the fast-growing end (barbed end) of actin filaments [1]. The structure of formins is mainly conserved in the C-terminal Formin Homology (FH) domains namely FH1, FH2 and the more loosely defined FH3 domain.