What do the flames mean? Look for the flame to find popular plasmids, determined by number of requests. Related articles How do I process my Addgene plasmid (bacterial stab)? How do I place an order? Does Addgene accept orders by fax, phone or email? Are there any requirements for viewing plasmid sequence data on the Addgene website? What do I need to know about the customs and importation process for my country? What does it mean if a material requires additional regulatory approval?