Background:L-Trp is an essential amino acid necessary for protein synthesis in mammaliancells, and the L-Trp to Kyn pathway is firmly established as a key regulator of innate andadaptive immunity. Catabolism of L-Trp to Kyn maintains an immunosuppressivemicroenvironment by starving immune cells of L-Trp and releasing degradation products of L-Trpthat have immunosuppressive functions. TDO is upregulated in many tumors, providingcancer cells with an avenue for immune evasion. Description:The TDO Cellular Activity QuickDetectTM Supplements are designed tocomplement the hTDO-HEK293 Recombinant Cell Line (BPS Cat. #60534) or other TDO-expressingcell lines. This kit contains the cell culture medium supplements necessary foractivation of TDO and for the analysis and detection of tryptophan 2,3 dioxygenase (TDO)-catalyzed conversion of L-tryptophan (L-Trp) to Kynurenine (Kyn). The supplements and thedetection reagents, when used as described, allow for indirect measurement of Kyn levels byanalyzing absorption at 480 nm. Synonym(s): tryptophan 2,3 dioxygenase, TDO2, TDO, TPH2, TRPO Format:

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Instructions for use: See datasheet for detailed protocol. Storage / Stability: Stable for at least 6 months when stored as directed. Application(s): • Monitor TDO pathway activity • Screen for activators or inhibitors of TDO in a cellular context Notes:

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License Disclosure:Purchase of this cell line grants you with a 10-year license to use this cell line in your immediate laboratory, for research use only. This license does not permit you to share, distribute, sell, sublicense, or otherwise make the cell line available for use to other laboratories, departments, research institutions, hospitals, universities, or biotech companies. The license does not permit use of this cell line in humans or for therapeutic or drug use. The license does not permit modification of the cell line in any way. Inappropriate use or distribution of this cell line will result in revocation of the license and result in an immediate cease of sales and distribution of BPS products to your laboratory. BPS does not warrant the suitability of the cell line for any particular use, and does not accept any liability in connection with the handling or use of the cell line. Modifications of this cell line, transfer to another facility, or commercial use of the cells may require a separate license and additional fees; contact sales@bpsbioscience.com for details. Publications using this cell line should reference BPS Bioscience, Inc., San Diego.

Warning(s): *Note: both trichloroacetic acid and acetic acid are strongly corrosive acids; please use gloves and appropriate protective clothing. Scientific Category: Immunotherapy Product Type: Cell Line Data shown is lot-specific. Contact us for specific information on other lots.

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