Ethidium bromide-stained PCR products after Gel electrophoresis. Two sets of primers were used to amplify the IGF gene from three different DNA samples. In sample #1 the gene was not amplified by PCR, whereas bands for tissue #2 and #3 indicate successful amplification of the IGF gene. A positive control, and a DNA ladder containing DNA fragments of defined length (last lane to the right) to estimate fragment sizes in the experimental PCRs, were also ran on this gel

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Ethidium bromide-stained PCR products after Gel electrophoresis. Two sets of primers were used to amplify the IGF gene from three different DNA samples. In sample #1 the gene was not amplified by PCR, whereas bands for tissue #2 and #3 indicate successful amplification of the IGF gene. A positive control, and a DNA ladder containing DNA fragments of defined length (last lane to the right) to estimate fragment sizes in the experimental PCRs, were also ran on this gel