1.14.11.8 cytosol - 1.14.11.8 mitochondrion - 1.14.11.8 mitochondrion exclusively in 1.14.11.8 mitochondrion mitochondrial matrix, product formation is limited by 6-N-trimethyllysine transport across the mitochondrial inner membrane 1.14.11.8 additional information no activity found in microsomal or soluble fractions of liver