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J Immunoassay. 1999 Feb-May;20(1-2):13-30.

Blocking of non-specific sorption in ELISA on formylated polystyrene beads.

Author information

1
Institute of Physical Organic Chemistry, Belarussian Academy of Sciences, Minsk. ifoch@ifoch.bas-net.by

Abstract

The effect of pH of the blocking solution on the non-specific sorption of peroxidase conjugates to the 0.63-cm formylated polystyrene beads was studied. Anti-G-HRP and BSA-HRP sorption was shown to dramatically depend on pH of blocking protein solutions and was minimum at pH=pI. Sorption of G-HRP weakly depended on pH of the blocking buffer. The blocking efficiency of proteins on unmodified beads, as well as of Tween-20 on formylated beads appeared to be pH independent. The optimized blocking step resulted in a multiple decrease in the non-specific sorption of conjugates on formylated beads.

PMID:
10225512
DOI:
10.1080/01971529909349311
[Indexed for MEDLINE]

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