The activity of DNA topoisomerase Ⅱ prepared from either normal or tumor tissues were compared. It was found that the unknotting activity of the enzyme in mali
With DNA-mRNA hybridization in situ technique, the expression of five oncogenes, c-N-ras, c-Ki-ras. c-Ha-ras, c-myc and c-fos, was observed in two cases of huma
The histopathological features of the globoid dysplasia of the human gastric epithelium were described in detail and in series by means of observation of serial
The distribution and ultrastructural localization of CEA in signet-ring cells of 15 gastric cancer specimens were observed by PAP and immunoelectron microscopic