24 May 2007 -- Researchers have deciphered how neurotransmitter transporter proteins recognise their targets, a finding which may provide clues for better design of drugs used to treat depression. The research at The University of Auckland focused on the creatine transporter, a membrane protein similar to neurotransmitter transporter proteins. The research has identified the area of the transporter required for recognition of creatine, a discovery which may allow scientists to develop new drugs to block the activity of neurotransmitter transporters in the treatment of depression and epilepsy.