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Trivalent hydroxyarsinothricn (R-AST-OH) is a covalent and irreversible inhibitor of kidney-type glutaminase (KGA). It binds to the glutamine binding site and forms a covalent bond with the cysteine residue at the active site. This compound selectively kills triple-negative breast cancer (TNBC) cells without being cytotoxic to control cell lines. KGA is an enzyme that regulates glutamine metabolism and is associated with tumor malignancy.

| Description | Trivalent hydroxyarsinothricn (R-AST-OH) is a covalent and irreversible inhibitor of kidney-type glutaminase (KGA). It binds to the glutamine binding site and forms a covalent bond with the cysteine residue at the active site. This compound selectively kills triple-negative breast cancer (TNBC) cells without being cytotoxic to control cell lines. KGA is an enzyme that regulates glutamine metabolism and is associated with tumor malignancy. |
| Synonyms | R-AST-OH |
| Formula | C4H10AsNO4 |
| Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice/Shipping at ambient temperature. |

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