[1] Univ British Columbia, Vancouver, BC, Canada
[2] Univ British Columbia, Fac Med, Inst Life Sci, Dept Biochem & Mol Biol, Vancouver, BC, Canada
[3] Univ British Columbia, Michael Smith Lab, Fac Med, Dept Biochem & Mol Biol, Vancouver, BC, Canada
[4] Univ Regina, Fac Sci, Dept Biochem, Regina, SK, Canada