anti-MLH1 antibody [SQab1863]

anti-MLH1 antibody [SQab1863] for IHC-Formalin-fixed paraffin-embedded sections,Flow cytometry,ICC/IF and Human


Product Description Recombinant Rabbit Monoclonal antibody [SQab1863] recognizes MLH1
Tested Reactivity Hu
Tested Application FACS, ICC/IF, IHC-P
Host Rabbit
Clonality Monoclonal
Clone SQab1863
Isotype IgG
Target Name MLH1
Antigen Species Human
Immunogen Synthetic peptide within aa. 400‐500 of MLH1.
Conjugation Un-conjugated
Alternate Names HNPCC2; COCA2; FCC2; hMLH1; MutL protein homolog 1; DNA mismatch repair protein Mlh1; HNPCC

Application Instructions

Application Suggestion
Tested Application Dilution
FACS1:20 - 1:100
ICC/IF1:200 - 1:1000
IHC-P1:200 - 1:400
Application Note IHC-P: Antigen Retrieval: Heat mediated was performed using Tris/EDTA buffer pH 9.0.
* The dilutions indicate recommended starting dilutions and the optimal dilutions or concentrations should be determined by the scientist.


Form Liquid
Purification Purification with Protein A.
Buffer PBS, 0.01% Sodium azide, 40% Glycerol and 0.05% BSA.
Preservative 0.01% Sodium azide
Stabilizer 40% Glycerol and 0.05% BSA
Storage Instruction For continuous use, store undiluted antibody at 2-8°C for up to a week. For long-term storage, aliquot and store at -20°C. Storage in frost free freezers is not recommended. Avoid repeated freeze/thaw cycles. Suggest spin the vial prior to opening. The antibody solution should be gently mixed before use.
Note For laboratory research only, not for drug, diagnostic or other use.


Database Links

GeneID: 4292 Human MLH1

Swiss-port # P40692 Human DNA mismatch repair protein Mlh1

Gene Symbol MLH1
Gene Full Name mutL homolog 1
Background MLH1 protein can heterodimerize with mismatch repair endonuclease PMS2 to form MutL alpha, part of the DNA mismatch repair system. When MutL alpha is bound by MutS beta and some accessory proteins, the PMS2 subunit of MutL alpha introduces a single-strand break near DNA mismatches, providing an entry point for exonuclease degradation. The encoded protein is also involved in DNA damage signaling and can heterodimerize with DNA mismatch repair protein MLH3 to form MutL gamma, which is involved in meiosis. This gene was identified as a locus frequently mutated in hereditary nonpolyposis colon cancer (HNPCC). [provided by RefSeq, Aug 2017]
Function MLH1 heterodimerizes with PMS2 to form MutL alpha, a component of the post-replicative DNA mismatch repair system (MMR). DNA repair is initiated by MutS alpha (MSH2-MSH6) or MutS beta (MSH2-MSH3) binding to a dsDNA mismatch, then MutL alpha is recruited to the heteroduplex. Assembly of the MutL-MutS-heteroduplex ternary complex in presence of RFC and PCNA is sufficient to activate endonuclease activity of PMS2. It introduces single-strand breaks near the mismatch and thus generates new entry points for the exonuclease EXO1 to degrade the strand containing the mismatch. DNA methylation would prevent cleavage and therefore assure that only the newly mutated DNA strand is going to be corrected. MutL alpha (MLH1-PMS2) interacts physically with the clamp loader subunits of DNA polymerase III, suggesting that it may play a role to recruit the DNA polymerase III to the site of the MMR. Also implicated in DNA damage signaling, a process which induces cell cycle arrest and can lead to apoptosis in case of major DNA damages. Heterodimerizes with MLH3 to form MutL gamma which plays a role in meiosis. [UniProt]
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Calculated MW 85 kDa

Images (3) Click the Picture to Zoom In

  • ARG66315 anti-MLH1 antibody [SQab1863] ICC/IF image

    Immunofluorescence: HeLa cells were fixed with 4% paraformaldehyde for 30 min at RT, permeabilized with 0.1% Triton X-100 for 10 min at RT then blocked with 10% goat serum for 30 min at RT. Cells were stained with ARG66315 anti-MLH1 antibody [SQab1863] (red) at 1:1000 and 4°C. DAPI (blue) was used as the nuclear counter stain.

  • ARG66315 anti-MLH1 antibody [SQab1863] FACS image

    Flow Cytometry: HeLa cells were fixed with 4% paraformaldehyde (10 min) and then permeabilized with 0.1% TritonX-100 for 15 min. The cells were stained with ARG66315 anti-MLH1 antibody [SQab1863] (red) at 1:100 dilution in 1x PBS/1% BSA for 30 min at RT, followed by Alexa Fluor® 488 labelled secondary antibody. Unlabelled sample (black) was used as a control.

  • ARG66315 anti-MLH1 antibody [SQab1863] IHC-P image

    Immunohistochemistry: Formalin-fixed and paraffin-embedded Human colon tissue stained with ARG66315 anti-MLH1 antibody [SQab1863] at 1:200 dilution. Antigen Retrieval: Heat mediated was performed using Tris/EDTA buffer pH 9.0.