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. 2000 May 24;2(4):311–320. doi: 10.1186/bcr73

Figure 3.

Figure 3

Preliminary characterization of FGFR2 expression in SUM-52PE cells. (a) Exon III-specific primers were used in RT-PCR of SUM-52PE RNA. RT-PCR product was then digested with Ava I or Hinc II at 37°C overnight and then resolved on a 3% NuSieve gel. Exon IIIb contains one unique Ava I site, whereas exon IIIc contains two Hinc II sites, and therefore the proportion of Ava I digest fragments to Hinc II digest fragments determines the proportion of IIIb to IIIc variants present. The presence of 269 and 188 bp fragments generated by Ava I digestion (lane 2) and lack of Hinc II digested products (lane 3) confirms the exclusive presence of exon IIIb in FGFR2 variants in the SUM-52PE cell line. (b) SUM-52PE mRNA was reverse transcribed using an oligo dT primer, and then amplified using a 5' -FGFR2-specific primer and a 3' -specific primer for C1/C2 or C3. Equimolar amounts of primer were used in the PCR reaction, and then 2 or 5 μ l of PCR product were compared on a 0.8% agarose gel. Lane 1, 2 μ l C1/C2 product; lane 2,5 μ l C1/C2 product; lane 3, 2 μ l C3 product; lane 4, 5 μ l C3 product.