CST

http://www.cellsignal.com/support/protocols/index.html

R&D

http://www.rndsystemschina.com.cn/technical_information.aspx

Ebioscience

http://www.ebioscience.com/ebioscience/FAQs.htm

GE Healthcare

http://www.gehealthcare.com/cnzh/products.html

BECKMAN COULTER

http://www.beckman.com/customersupport/default.asp