GloLIVE Human TRA-1-81 NL493 Live Cell Antibody

50X Concentration, Azide Free
Catalog # Availability Size / Price Qty
NLLC16581G
Product Details
Procedure
FAQs
Reviews

GloLIVE Human TRA-1-81 NL493 Live Cell Antibody Summary

Kit Summary

To detect TRA-1-81 expression in live cells by immunocytochemical staining.

Key Benefits

  • Verifies marker expression in live stem cells
  • Requires only one 30 minute incubation
  • Permits continued cell culture post-staining
  • Does not affect cell proliferation or stemness
 

 

Why confirm marker expression in live cells before colony selection?

Maintaining pluripotent human embryonic stem cells and deriving induced pluripotent stem cells require colony selection and cell expansion. Picking colonies that contain pluripotent stem cells is typically achieved by manually analyzing colony morphology. Unfortunately, this critical process is time-consuming and labor-intensive.

In addition, morphology-based colony selection does not consistently guarantee pluripotent starting populations, since cells can fail to be fully reprogrammed or can naturally differentiate within a colony.

To address this need, R&D Systems brand GloLIVE antibodies allow researchers to confirm stem cell marker expression in live cells before colony selection.

Live pluripotent stem cell imaging:

  • Promotes the selection of high quality, undifferentiated stem cell colonies to reduce experimental variation.
  • Verifies stem cell pluripotency in 30 minutes, ensuring efficient use of time and reagents.
  • Allows for the continued culture of pluripotent cells with no adverse effects on cell proliferation or stemness following staining.

 

Antibody Components
  • GloLIVE NL493-conjugated Mouse Anti-Human TRA-1-81 Monoclonal Antibody.
  • Supplied as 50X concentration of antibody in 0.5 mL PBS

Azide free and endotoxin tested (< 5 EU/mL), this antibody can be used for 12 tests, if a staining volume of 2 mL is used.

 

Data
Detection of TRA-1-81 in Live BG01V Human Embryonic Stem Cells.
View Larger Image

Detection of TRA-1-81 in Live BG01V Human Embryonic Stem Cells. The stem cell marker TRA-1-81 was visualized in live BG01V human embryonic stem cells using the GloLIVE NL493-conjugated Mouse Anti-Human TRA-1-81 Monoclonal Antibody (Catalog # NLLC16581G; green) and counterstained with Hoechst 33342 (blue). Positive staining for TRA-1-81 in human stem cells is an indicator of pluripotency.

* BG01V human embryonic stem cells are licensed from ViaCyte, Inc

Specifications

Shipping Conditions
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Storage
Store the unopened product at 2 - 8° C. Do not use past expiration date. Protect from light.
Applications
Immunocytochemistry
Species
Human

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Product Datasheets

Background: TRA-1-81

Long Name
Tumor-related Antigen-1-81
Entrez Gene IDs
5420 (Human)
Alternate Names
gp200; MGC138240; PC; PCLP; PODXL; TRA181; TRA-1-81

Assay Procedure

Refer to the product datasheet for complete product details.

Briefly, TRA-1-81 expression can be verified in live cells prior to colony selection or experimentation using this simple procedure:

  • Add the TRA-1-81 antibody directly to the media of cultured cells
  • Wash the cells after a 30 minute incubation
  • Select for and expand TRA-1-81-positive colonies
 

 

Precautions

Use aseptic technique and sterile culturing conditions to prevent contamination.

 

Reagents Provided
  • GloLIVE NL493-conjugated Mouse Anti-Human TRA-1-81 Monoclonal Antibody (Catalog # NLLC16581G).

 

Other Supplies Required

Reagents

  • Stem cell culture media

Materials

  • Human or mouse pluripotent stem cells
  • Pipettes and pipette tips
  • Serological pipette

Equipment

  • 37 °C and 5% CO2 incubator
  • Fluorescence microscope

 

Live Cell Immunocytochemistry Procedure Overview

To ensure sterility of cultures, all steps should be performed under sterile conditions.

Add fluorochrome-conjugated primary antibody in appropriate culture media to cells.

Incubate at 37 °C for 30 minutes.

Live Cell Immunocytochemistry Procedure Overview Step 1

Replace with fresh culture media.

Live Cell Immunocytochemistry Procedure Overview Step 2

Visualize using a fluorescence microscope.

Live Cell Immunocytochemistry Procedure Overview Step 3
 

Culture with GloLIVE antibodies does not appear to affect cell proliferation or stemness as assayed by proliferation curves for 3 days post-antibody incubation.

Reagents Provided

FAQs

  1. What is the recommended starting confluence to observe staining?

    • The optimal confluence would depend on the purpose of the staining. If the plan is to use all the cells in the flask after they have proliferated, then one can wait for the cells to become confluent or almost confluent (80-90% confluent) and then check the staining. If the goal is to to check on the cells mid-way through their growth and there are sufficient cells in the flask, one could check the staining then as well. The staining is not dependent on how many cells are in the flask, as long as there are sufficient cells.

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