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Ansamitocin P-3 (GMP) refers to the GMP grade reagents of Ansamitocin P-3. Ansamitocin p-3 (Maytansinol isobutyrate) is an inhibitor of microtubule with IC50 of 3.4 μM for tubulin polymerization.


| Description | Ansamitocin P-3 (GMP) refers to the GMP grade reagents of Ansamitocin P-3. Ansamitocin p-3 (Maytansinol isobutyrate) is an inhibitor of microtubule with IC50 of 3.4 μM for tubulin polymerization. |
| In vitro | Ansamitocin p-3 inhibits the proliferation in a concentration-dependent manner with IC50s of 20, 50, 140, and 150 pM for MCF-7, HeLa, EMT-6/AR1, and MDA-MB-231 cells in culture, respectively. Ansamitocin P3 binds to purified tubulin (Kd = 1.3 µM)[1]. |
| Molecular Weight | 635.14 |
| Formula | C32H43ClN2O9 |
| Cas No. | 66584-72-3 |
| Relative Density. | 1.29g/cm3 |
| Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year |

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