Glossary

Bicarbonate Buffer

Glossary / Bicarbonate Buffer
Reagent

Bicarbonate Buffer — A buffering system based on carbonic acid and bicarbonate ions that maintains physiological pH (~7.4) in cell culture media for peptide bioassays.

Category
Reagent
Glossary Section
B

What Is Bicarbonate Buffer?

Bicarbonate buffer (NaHCO3/CO2) is the primary physiological buffering system maintaining blood pH at 7.35-7.45. In peptide research, bicarbonate buffers are used in cell culture media (equilibrated with 5% CO2 incubator atmosphere) and as alkaline reaction buffers for conjugation reactions requiring pH 8-9.

Applications

  • Cell culture: DMEM and RPMI media contain 24-44 mM NaHCO3. Requires CO2 incubator for pH stability
  • NHS ester conjugation: pH 8.3 bicarbonate buffer optimal for amine-reactive biotinylation
  • Limitation: pH drifts outside CO2 incubator. Use HEPES or phosphate for bench-top experiments

Frequently Asked Questions

What is Bicarbonate Buffer?

A buffering system based on carbonic acid and bicarbonate ions that maintains physiological pH (~7.4) in cell culture media for peptide bioassays.

Why is Bicarbonate Buffer important in peptide research?

Bicarbonate Buffer is a fundamental concept in reagent as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.

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