Native, rabbit serum complement is tested for suitability for HLA-ABC serology. Useful as an active source of complement for use with hybridoma antibodies, alloantisera, and related applications in which a non-cytotoxic source is required. Total lympholytic complement activity determined under conditions of NIH two-step cytotoxicity test that uses defined HLA isoantisera.

• Activity present at a titer of at least 1:4
• No intrinsic cytotoxicity against human peripheral blood lymphocytes
• Intended for micro and macro lymphocyte cytotoxicity testing with human or animal sera