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Biological Buffers


Synonym: N-(1,1-Dimethyl-2-hydroxyethyl)-3-amino-2-hydroxypropanesulfonic acid

AMPSO is used as a buffer for PCR amplification2. Also, due to its higher alkalinity, it allows for the almost complete transfer of strongly basic proteins from gels to nitrocellulose without lowering the transfer efficiency for other proteins1.
Useful pH Range 8.3 - 9.7
Working concentration range 100mM4


        Comparison of products by grade or quality level
Name CAS Molecular Formula Mol Wt Reagent Grades Life Science Grades PharmaGrade  Solutions
AMPSO 68399-79-1 C7H17NO5S 227.28 A6659 40695    
AMPSO sodium salt 102029-60-7 C7H16NO5SNa 249.26 A1911      


Interaction Comments

Strong interaction with Co, Ni and Cu; weak interaction with Zn, Cd and Pb3


Literature References

  1. Szewczyk, B. & Kozloff, L.M. (1985) Anal. Biochem. 150, 403-407. A method for the efficient blotting of strongly basic proteins from SDS-polyacrylamide gels to nitrocellulose.
  2. D P McGregor et. al. BioTechniques, 21(3), 463-461 (1996)
  3. Ferreira CM, Pinto IS, Soares, EV, Soares HM. 2015 Royal Society of Chemistry 30989- 31003
  4. Varghese J. BACE-Lead target for Orchestrated Therapy of Alzheimer's Disease; Wiley 2010