I would think they are alright if they have been kept lyophilized at 4dc, I would certainly try them. Once you reconstitute them, freeze small aliquots for future use unless they are hrp conjugated. Patsy
Patsy Ruegg, HT(ASCP)QIHC IHCtech 12635 Montview Blvd. #215 Aurora, CO 80045 720-859-4060 fax 720-859-4110 [EMAIL PROTECTED] www.ihctech.net www.ihcrg.org -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Suhyoung Jeong Sent: Friday, October 24, 2008 2:02 PM To: Histonet@lists.utsouthwestern.edu Subject: [Histonet] More than 4 years old secondary antibodies Hello everyone, I got some still-lyophilyzed kept-in-4C secondary antibodies recently. We don't know exactly how old they are, but the company (Zymed) could not track the lot number on the bottle. They said that they discard the record after 4 years and that makes these antibodies at least 4 years old. I assume between 5-7 years old. Has anyone have some idea whether it will be worth testing these antibodies? Thank you in advance Regards, Suh _______________________________________________ Histonet mailing list Histonet@lists.utsouthwestern.edu http://lists.utsouthwestern.edu/mailman/listinfo/histonet _______________________________________________ Histonet mailing list Histonet@lists.utsouthwestern.edu http://lists.utsouthwestern.edu/mailman/listinfo/histonet