Fig. 6.
Pulse chase analysis of β3 integrin biosynthesis.
Wild-type, His280Pro, or Arg216Gln/Leu292Serβ3 cDNA was cotransfected into 293 cells with either (A) wild-type αIIb cDNA or (B) wild-type αv cDNA. Cells were labeled one day after transfection with 0.4 mCi/mL (14.8 MBq) [35S]methionine for 30 minutes and chased with media containing 50 μg/mL of nonradioactive methionine for various periods of time as indicated. Immunoprecipitation was performed using either (A) TP80 or (B) LM142. Precipitates were separated by 6% SDS-PAGE under reducing conditions. Results are representative of 3 separate experiments.