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- General tubulin buffer: 1x stock
General tubulin buffer: 1x stock
Product Uses Include
- Resuspension and storage of tubulin
General tubulin buffer (PEM). Contains 80 mM PIPES pH 6.9, 2 mM MgCl2 and 0.5 mM EGTA. Used as a tubulin working buffer in the form of G-PEM (i.e. PEM plus 1 mM GTP (Cat.# BST06)) or a tubulin polymerization buffer in the form of glycerol containing G-PEM (PEM plus 1 mM GTP (Cat. # BST06) and e.g. 5% glycerol (see Cat. # BST05)).
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Risinger et al., 2011. ELR510444, A Novel Microtubule Disruptor with Multiple Mechanisms of Action. J. Pharmacol. Exp. Ther. 336, 652–660.
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Question 1: How does general tubulin buffer differ from G-PEM buffer?
Answer 1: Basically, these buffers are the same except that G-PEM contains 1mM GTP to support tubulin polymerization. General tubulin buffer (Cat. # BST01) and PEM buffer typically contain 80 mM PIPES, 2 mM MgCl2, 0.5 mM EGTA pH 7.0. Both buffers should be supplemented with 1 mM GTP (hence, the “G” in G-PEM buffer).
Question 2: Is glycerol necessary for the maintenance of biologically-active tubulin?
Answer 2: Glycerol is often added to a final concentration of 5 - 10% to enhance polymerization; however, glycerol is not necessary for the maintenance of biologically active tubulin.
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