Table 1 Concentrations of serum PTH, serum Ca²⁺, and urinary Ca²⁺ and weights of PT-KO (KO), PT-Het (Het), and control (Cont) littermates.

	Cont (n = 19 mice)	Het (n = 13 mice)	KO (n = 11 mice)
Serum [PTH] (pg/ml)	52.7 ± 1.6	170 ± 27.4^*	959 ± 122^*
Fold over control		+2.3	+17.2
Serum [Ca²⁺] (mg/dl)	11.6 ± 0.1	13.4 ± 0.2^*	16.4 ± 0.5^*
% Change over control		+16	+40
Urine [Ca²⁺] (mg/dl)	2.8 ± 0.4	3.5 ± 0.5 ^*	13.4 ± 2.9^*
% Change over control		+25	+380
Body weight (g)	8.7 ± 0.3	8.4 ± 0.5	3.8 ± 0.4^*
% Change vs. control			−56

*P < 0.01.