TABLE 1
CYP isoform characterization of individual HLM pools


Isoform Probe Batch 1 Batch 2 Batch 3

pmol/min/mg
P450 content CO difference spectrum 320a 280a 430a
P450 reductase Cytochrome c reduction 69000 84000 75000
CYP 7-Ethoxycoumarin O-demethylation 255 210 240
CYP1A2 Phenacetin O-dethylation 366 310 193
CYP2A6 Coumarin 7-hydroxylation 17200 81900 58600
CYP2E1 Chlorzoxazone 6-hydroxyline 1010 1911 1441
CYP2C Mephenytoin 4-hydroxylation 27 233 11
CYP2D6 Dextromethorphan O-demethylation 200 84 106
CYP3A Testosterone 6beta -hydroxylation 2600 1500 1900
CYP4A Lauric acid 11-hydroxylation 1000 1600 1600

a  Picomoles of CYP per milligram of microsomal protein.