1132-61-2

Reference

P. H. Quail, D. Marme, E. Sch?fer, Particle-bound phytochrome from maize and pumpkin, Nature New Biology, 1973, vol. 245, pp. 189-191

Flammability and Explosibility

Notclassified

application

MOPS is frequently used as a buffering agent in biology and biochemistry. It has been tested and recommended for polyacrylamide gel electrophoresis. Usage above 20 mM in mammalian cell culture work is not recommended. MOPS buffer solutions become discolored (yellow) over time, but reportedly slight discoloration does not significantly affect the buffering characteristics.

Definition

ChEBI: 3-(N-morpholino)propanesulfonic acid is a Good's buffer substance, pKa = 7.2 at 20 ℃. It is a member of morpholines, a MOPS and an organosulfonic acid. It is a conjugate acid of a 3-(N-morpholino)propanesulfonate. It is a tautomer of a 3-(N-morpholiniumyl)propanesulfonate.

General Description

3-(N-Morpholino)propane sulfonic acid (MOPS) is an N-substituted amino sulfonic acid with a morpholinic ring. MOPS is capable of buffering within a pH range of 6.5-7.9. MOPS is widely used in biological and biochemical studies due to its inert properties. It does not interact with any metal ions in solutions and has significant metal-buffer stability especially with copper (Cu), nickel (Ni), manganese (Mn), zinc (Zn), cobalt (Co) ions. MOPS buffer maintains the pH of the mammalian cell culture medium. MOPS functions to maintain pH in denaturing gel electrophoresis of RNA. MOPS can modify lipid interactions and influence the thickness and barrier properties of membranes. MOPS interacts with bovine serum albumin and stabilizes the protein. Hydrogen peroxide oxidizes MOPS slowly to N-oxide form.