Table 2

Incubation of ¹⁴C PHT with human liver slices

HL ID	K-H Buffer		4% BSA in K-H Buffer
HL ID	V_max^2-a	K_m^2-b	V_max	K_m
21	23.0	7.95	91.9	2.03
22	175.	3.68	170.	1.44
23	39.4	10.5	36.0	2.58
24	148.	4.44	181.	2.74

Mean	96.4	6.64	120.	2.20
S.D.	76.3	3.17	68.5	0.59
Coefficient of variation, %	79.2	47.8	57.2	26.8

↵2-a V_max results expressed as pmol/min/g liver tissue.
↵2-b All K _m values are expressed as μM unbound PHT.