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REACTIVITY SENSITIVITY MW (kDa) Isotype
H M R Endogenous 15 Rabbit IgG
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Immunohistochemical analysis of paraffin-embedded human breast carcinoma using Galectin-1/LGALS1 (D608T) Rabbit mAb (IHC Formulated) in the presence of control peptide (left) or antigen specific peptide (right).

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Immunohistochemical analysis of paraffin-embedded human ovarian mucinous cystadenocarcinoma using Galectin-1/LGALS1 (D608T) Rabbit mAb (IHC Formulated).

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Immunohistochemical analysis of paraffin-embedded A549 (left) and LNCaP (right) cell pellets using Galectin-1/LGALS1 (D608T) Rabbit mAb (IHC Formulated).

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Immunohistochemistry (Paraffin)

A. Solutions and Reagents

NOTE: Prepare solutions with reverse osmosis deionized (RODI) or equivalent grade water.

  1. Xylene.
  2. Ethanol, anhydrous denatured, histological grade (100% and 95%).
  3. Deionized water (dH2O).
  4. Hematoxylin (optional).
  5. Wash Buffer:
    1. 1X Tris Buffered Saline with Tween® 20 (TBST): To prepare 1L 1X TBST add 100 ml 10X Tris Buffered Saline with Tween® 20 (#9997) to 900 ml dH20, mix.
  6. SignalStain® Antibody Diluent (#8112).
  7. Antigen Unmasking Citrate: 10 mM Sodium Citrate Buffer: To prepare 1 L, add 2.94 g sodium citrate trisodium salt dihydrate (C6H5Na3O7•2H2O) to 1 L dH2O. Adjust pH to 6.0.
  8. 3% Hydrogen Peroxide: To prepare 100 ml, add 10 ml 30% H2O2 to 90 ml dH2O.
  9. Blocking Solution: TBST/5% Normal Goat Serum: to 5 ml 1X TBST, add 250 µl Normal Goat Serum (#5425).
  10. Detection System: SignalStain® Boost IHC Detection Reagents (HRP, Rabbit #8114).
  11. Substrate: SignalStain® DAB Substrate Kit (#8059).

B. Deparaffinization/Rehydration

NOTE: Do not allow slides to dry at any time during this procedure.

  1. Deparaffinize/hydrate sections:
    1. Incubate sections in three washes of xylene for 5 min each.
    2. Incubate sections in two washes of 100% ethanol for 10 min each.
    3. Incubate sections in two washes of 95% ethanol for 10 min each.
  2. Wash sections two times in dH2O for 5 min each.

C. Antigen Unmasking

For Citrate: Bring slides to a boil in 10 mM sodium citrate buffer, pH 6.0; maintain at a sub-boiling temperature for 10 min. Cool slides on bench top for 30 min.

D. Staining

  1. Wash sections in dH2O three times for 5 min each.
  2. Incubate sections in 3% hydrogen peroxide for 10 min.
  3. Wash sections in dH2O two times for 5 min each.
  4. Wash sections in wash buffer for 5 min.
  5. Block each section with 100–400 µl blocking solution for 1 hr at room temperature.
  6. Remove blocking solution and add 100–400 µl primary antibody diluted in SignalStain® Antibody Diluent (#8112) to each section. Incubate overnight at 4°C.
  7. Equilibrate SignalStain® Boost Detection Reagent (HRP, Rabbit #8114) to room temperature.
  8. Remove antibody solution and wash sections with wash buffer three times for 5 min each.
  9. Cover section with 1–3 drops SignalStain® Boost Detection Reagent (HRP, Rabbit #8114) as needed. Incubate in a humidified chamber for 30 min at room temperature.
  10. Wash sections three times with wash buffer for 5 min each.
  11. Add 1 drop (30 µl) SignalStain® DAB Chromogen Concentrate to 1 ml SignalStain® DAB Diluent and mix well before use.
  12. Apply 100–400 µl SignalStain® DAB to each section and monitor closely. 1–10 min generally provides an acceptable staining intensity.
  13. Immerse slides in dH2O.
  14. If desired, counterstain sections with hematoxylin per manufacturer’s instructions.
  15. Wash sections in dH2O two times for 5 min each.
  16. Dehydrate sections:
    1. Incubate sections in 95% ethanol two times for 10 sec each.
    2. Repeat in 100% ethanol, incubating sections two times for 10 sec each.
    3. Repeat in xylene, incubating sections two times for 10 sec each.
  17. Mount sections with coverslips.

posted February 2010

revised November 2013

protocol id: 283

Product Usage Information

Application Dilutions
Immunohistochemistry 1:250

Storage: Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

Specificity / Sensitivity

Galectin-1/LGALS1 (D608T) Rabbit mAb (IHC Formulated) recognizes endogenous levels of total galectin-1/LGALS1 protein.


Species Reactivity: Human, Mouse, Rat

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues near the amino terminus of human galectin-1/LGALS1 protein.

Galectins are a family of β-galactose binding proteins that are characterized by their affinity for poly-N-acetyllactosamine-enriched glycoconjugates and their carbohydrate-binding site (1,2). Members of the galectin family have been implicated in a variety of biological functions including cell adhesion (3), growth regulation (4), cytokine production (5), T cell apoptosis (6), and immune responses (7). Galectin-1/LGALS1 has been shown to be expressed in a wide range of tissues and cell types. The level and pattern of expression of galectin-1 has been shown to change during development (8). In addition to a role in developmental processes, galectin-1 has been shown to be involved in central immune tolerance and may function in tumorigenesis by modulating the immune response to the tumor (9,10). Research studies have shown that galectin-1 expression is increased in several human cancers, suggesting a correlation with metastatic potential (10).


1.  Barondes, S.H. et al. (1994) Cell 76, 597-8.

2.  Barondes, S.H. et al. (1994) J Biol Chem 269, 20807-10.

3.  Offner, H. et al. (1990) J Neuroimmunol 28, 177-84.

4.  Wells, V. and Mallucci, L. (1991) Cell 64, 91-7.

5.  Filer, A. et al. (2009) Arthritis Rheum 60, 1604-14.

6.  Perillo, N.L. et al. (1995) Nature 378, 736-9.

7.  Cooper, D.N. et al. (1991) J Cell Biol 115, 1437-48.

8.  Puche, A.C. et al. (1996) Dev Biol 179, 274-87.

9.  van den Brûle, F. et al. (2003) Lab Invest 83, 377-86.

10.  Salatino, M. et al. (2008) Expert Opin Biol Ther 8, 45-57.


Entrez-Gene Id 3956
Swiss-Prot Acc. P09382


For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology® is a trademark of Cell Signaling Technology, Inc.
SignalStain® is a trademark of Cell Signaling Technology, Inc.