Before 2006 most Research Use only Elisa kits came from USA.
The most known suppliers are RnD Systems which is the leading suppler of Cytokine and growth factor Elisa’s, Eli pairs and matched antibodies.
For recombination proteins the most knows supplier was Peprotech and for polyclonal antibodies Santa Cruz Bio-reagents from the Californian Coastal city of Santa Cruz.
In 2006 the government of Wuhan China, which has a great contact with the San Francisco California populations decided to invest in Elisa manufacturing. About 9000, yes nine-thousand PhD’s where started about Elisa production. The universities manufactured the antibody pairs the internal standard and would outsource this to local manufacturing companies that cannot export Elisa. These local companies sell the ready to use plated Elisa kits, manufactured mostly on demand to export companies. These export companies are prohibited to manufacture and only do export fro these research use Elisa kits.
Uscnk, Uscnelifescience, Cusabio, Wuhan Elisa, cloud clone, mybiosource made list with genetic horology blasts so they could use the Elisa kits not for only human proteins but also for the animal homologs. These list where distributed to the Gentaur distribution antibody online websites and sold to research labs.
Most of the Life Science Research Elisa kits are now made in China Wuhan. The quantity is very good Especially from USCN Life Science Elisa kits. Some rumors started circulating on Twitter that other suppliers gave house keeping gene Elisas instead of the specific gene they still didn’t have or dint function. These rumors where later confirmed by different research groups analyzing the internal standard and the antibody specificity by Western Blot.
Distributors like Gentaur are aware of these problem and always keep and iso9001 registry of the Corrective Action/Preventive Action (CAPA) in their ERP software.