1. An apparatus comprising a chamber having an inlet port and an outlet port, said chamber containing an isolated and purified antigenically-active native Rh blood group antigen protein or peptide immobilized on a solid support.
2. The apparatus of claim 1 , wherein said chamber is cylindrical.
3. The apparatus of claim 1 , wherein said protein or peptide is a mammalian antigen.
4. The apparatus of claim 3 , wherein said Rh antigen is a human Rh antigen or a rabbit homolog of a human Rh antigen.
5. The apparatus of claim 4 , wherein said antigen is a D antigen, a c antigen, a C antigen, an antigen, an E antigen, an A antigen, a B antigen, or an F antigen.
6. The apparatus of claim 1 , further comprising a pump.
7. The apparatus of claim 1 , wherein said solid support is selected from a glass, plastic, acrylate, methylmethacrylate, Sepharose, agarose, nylon, fiber, or glass wool support.
8. The apparatus of claim 1 , wherein said protein or peptide is immobilized wherein the pH is from about pH 1 to about pH 6.
9. The apparatus of claim 8 , wherein said pH is from about pH 2.4 to about pH 4.5.
10. The apparatus of claim 1 , wherein said antigen protein or peptide is immobilized in the presence of an amphoteric or zwitterionic buffer.
11. The apparatus of claim 10 , wherein said buffer is EDTA, WRA, MOPS, HEPES, glycine, alanine, Bis-Propane or Bis-Tris.
12. The apparatus of claim 10 , wherein said buffer is present at a concentration of from about 0.01% (weight/volume) to about 5% (weight/volume).
13. The apparatus of claim 12 , wherein said buffer is present at a concentration of from about 1% (weight/volume) to about 4% (weight/volume).
14. The apparatus of claim 1 , wherein the protein or peptide is antigenically-active when the pH is from about pH 1 to about pH 6 during use of the apparatus.
15. The apparatus of claim 14 , wherein the pH is from about pH 2.4 to about pH 4.5.
16. The apparatus of claim 1 , wherein the protein or peptide is antigenically-active for a period of at least 4 hours during use of the apparatus.
17. The apparatus of claim 11 , wherein the buffer is WRA.
18. The apparatus of claim 1 , further comprising an immunoaffinity column or matrix.
19. The apparatus of claim 1 , wherein said protein or peptide is linked to a detectable label.
20. The apparatus of claim 19 , wherein said detectable label is a radioactive label, a fluorogenic label, a nuclear magnetic spin resonance label, biotin, or an enzyme that generates a colored product upon contact with a chromogenic substrate.