We are planning to measure thymosin beta 4 expression in serum followed by tissue lysates using ELISA. We have looked into the R & D systems but they are not providing this ELISA kit. So, we are looking for the similar kind ELISA kit that provide R & D systems (without precoated plates). We need individual reagents for thymosin beta 4 ELISA so that we can coat the plates by primary antibody followed by subsequent procedures.