Tea2 is a kinesin family member from Schizosaccharomyces pombe that is targeted to microtubule tips and cell ends in a process that depends on Mal3. Constructs of Tea2 containing the motor domain only or the motor domain plus the N-terminal extension are monomeric, whereas a construct including the first predicted coiled coil region is dimeric. These constructs have a low basal rate of ATP hydrolysis of