A working stock solution can be prepared by adding 1 mL buffered saline, pH 7.4 (ex. 25 mM HEPES, 150 mM NaCl, 0.1% PEG 8000, pH 7.4). Further dilution should be made in buffer containing a suitable stabilizing agent such as 0.1%-1% Prionex, BSA, or PEG.
Human proteins, cDNA and human recombinants are used in human reactive ELISA kits and to produce anti-human mono and polyclonal antibodies. Modern humans (Homo sapiens, primarily ssp. Homo sapiens sapiens). Depending on the epitopes used human ELISA kits can be cross reactive to many other species. Mainly analyzed are human serum, plasma, urine, saliva, human cell culture supernatants and biological samples.