A protein complex capable of catalyzing the transfer of a group, e.g. a methyl group, glycosyl group, acyl group, phosphorus-containing, or other groups, from one compound (generally regarded as the donor) to another compound (generally regarded as the acceptor). [ http://www.ncbi.nlm.nih.gov/pubmed/16540464 GOC:bhm ]
This is just here as a test because I lose it