Table 3. Binding characteristics of the radiolabeled GHRH antagonist JV-1-42 to RL and HT human lymphomas and MDA-MB-231 human breast cancer xenografts grown in nude mice.

Tumor	Kd,* nM	Bmax,† fmol/mg membrane protein
MDA-MB-231	N.D.	N.D.
RL	4.8 ± 0.7	406.1 ± 24.8
HT	6.6 ± 0.1	365.2 ± 18.1

N.D., not detected.

^*Binding affinity.

^†Binding capacity.