A simple assay of intrinsic factor-vitamin B12 complex employing the binding intrinsic factor antibody
AUTOR(ES)
Jacob, Elizabeth
RESUMO
The reaction between binding intrinsic factor antibody and intrinsic factor-vitamin B12 complex has been studied. Initially in the zone of antibody excess, the relationship between the amount of antigen present and the amount of antigen-antibody complex adsorbed onto zirconium phosphate gel was linear. With increasing amounts of antigen, the curve departed from linearity and reached a plateau. The linear portion of the reaction forms the basis of a simple and reproducible assay for quantitating intrinsic factor to which vitamin B12 has already been bound. The assay provides a method for studying the fate of intrinsic factor-vitamin B12 complex during digestion and absorption. In two normal subjects given radioactive vitamin B12 orally, aspiration of ileal contents showed that only 50 to 70% of the radioactivity was bound to intrinsic factor at that level.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=477302Documentos Relacionados
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