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美國TopoGEN 
TopoGEN 公司是一家專門為拓?fù)涿秆芯刻峁┰噭┖驮噭┖小Ｔ噭┖锌梢杂行У胤治鐾負(fù)洚悩?gòu)酶 I ， II 和旋轉(zhuǎn)酶，分析細(xì)胞內(nèi)的拓?fù)湟种埔约懊枥L拓?fù)洚悩?gòu)酶抑制劑的特性。另外公司還提供 DNa c底物，拓?fù)湟种苿┖涂贵w等。

TopoGEN is a research diagnostic company that provides innovative products for researchers working with topoisomerases and engaged in mechanism based drug discovery. Kits are available to identify topoisomerase active drugs for use in cancer chemotherapy and antibacterial applications. The company also provides kits for assaying both prokaryotic and eukaryotic topoisomerases (type I, II, IV, gyrase), both in vitro and in vivo. We also offer a complete line of DNA substrates and DNA cleavage targets, topo inhibitors, antibodies, and kit replenishment reagents. The company was founded by researchers working with these enzymes and who can offer hands on assistance with your topoisomerase research, whether basic, clinical, applied or translational. TopoGEN was incorporated in 1991 and has a dedicated clientele. We offer substantial product support, data interpretation and consultation advice. We also provide contract screening services for topo poisons. Please enquire.