COX-2 expression and tumor angiogenesis in colorectal cancer

Figure 2 COX-2 and VEGF expressions in colorectal cancer tissues (RT-PCR assay). N: normal T: tumor IC: internal control M: marker. The Arabic number represents the number of samples. The marker has six lanes from 100 bp to 600 bp. The left four lanes stand for the 304 bp products of COX-2 while the right two lanes are the VEGF products of 541 and 408 bp respectively. The internal control of β -actin produced a 496 bp product.