1. Recombinant Proteins
  2. Immune Checkpoint Proteins
  3. Inhibitory checkpoint molecules
  4. IDO
  5. IDO Protein, Human

IDO Protein, Human

Cat. No.: HY-P73121
Handling Instructions

For research use only. We do not sell to patients.

Protein Expression Service

Size Price Stock
10 μg $250 Ask For Quote & Lead Time
50 μg $660 Ask For Quote & Lead Time

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IDO Protein, Human Featured Recommendations:

Top Publications Citing Use of Products
  • Biological Activity

  • Technical Parameters

  • Properties

  • Documentation

Biological Activity
Measured by its ability to oxidize L-tryptophan to N-formylk-ynurenine and the specific activity is > 500 pmoles/min/μg.



E. coli


Tag Free


P14902 (A2-G403)

Gene ID
Indoleamine 2; 3-dioxygenase 1; IDO-1; IDO1; IDO; INDO
Molecular Weight

Approximately 46 kDa


Greater than 85% as determined by reducing SDS-PAGE




Supplied as a 0.2 μm filtered solution of 50 mM NaAC, 100 mM Nacl, 20 % glycerol, pH 5.5.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Storage & Stability

Stored at -80°C. It is stable at -20°C for 3 months after opening. It is recommended to freeze aliquots at -80°C for extended storage. Avoid repeated freeze-thaw cycles.


Shipping with dry ice.


IDO Protein, Human Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

  • Reconstitution Calculator

  • Dilution Calculator

  • Specific Active Calculator

The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific active calculator equation

Specific Active (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Active (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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