I looi 



m 

 u 



t2 80- 



u 

 u 



Qu 

 OQ 



D 



60-- 



40-- 



20-- 



0- 



Z 



u 

 u 



£ -20 



a. l.OE-2 



0.1 1.0 10.0 100.0 



COMPETITOR CONCENTRATION (units) 



1000.0 



Figure 3. RIA of (•) 2505-10 fraction 7 Iplate 31, (♦) PbTx-3 intenul fUndard anve. 



0.1 1.0 10.0 100.0 



COMPETITOR CONCENTRATION (iiniU) 



1000.0 



Figure 4. RIA of (•) OO094 fraakn 5 [plate 2), (#) PbTx-3 mtenu] stnadaid cnrve. 



128 



