FIGURE 7. Autoradiogram of 5%–20% gradient SDS-PAGE gel of serum samples indicating no difference in processing of ¹³¹I-B72.3 in serum of AP-treated mice compared with ¹³¹I-B72.3 alone. Lanes: 1, ¹³¹I-B72.3 stored 22 d at 4°C; 2, ¹³¹I-B72.3 with AP; 3, ¹³¹I-B72.3 alone. All radioactivity recovered in serum 22 d after dosing is in form of ¹³¹I-B72.3. HPLC analyses on TSK G2000SW-TSK G3000SW columns confirmed this finding. MW = molecular weight.

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