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Human CHI3L1 / YKL40 ORF mammalian expression plasmid, C-Flag tag

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Human CHI3L1 cDNA Clone Product Information
RefSeq ORF Size:1152bp
cDNA Description:Full length Clone DNA of Homo sapiens chitinase 3-like 1 (cartilage glycoprotein-39) with C terminal Flag tag.
Gene Synonym:GP39, ASRT7, YKL40, YYL-40, HC-gp39, HCGP-3P, FLJ38139, DKFZp686N19119, CHI3L1
Restriction Site:KpnI + XbaI (6kb + 1.2kb)
Sequence Description:Identical with the Gene Bank Ref. ID sequence except for the point mutations: 1092 T>C not causing the amino acid variation.
Promoter:Enhanced CMV mammalian cell promoter
Application:Stable or Transient mammalian expression
Antibiotic in E.coli:Kanamycin
Antibiotic in mammalian cell:Hygromycin
Shipping_carrier:Each tube contains lyophilized plasmid.
Storage:The lyophilized plasmid can be stored at room temperature for three months.
Human CHI3L1 Gene Plasmid Map
Human CHI3L1 / YKL40 Gene cDNA Clone (full-length ORF Clone), expression ready, C-FLAG-tagged
Human CHI3L1 Gene Expression validated Image
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The plasmid was transfected into 293H adherent cells with Sinofection reagent (Cat# STF01). After 48 h, Immunofluorescence staining of cells. Cells were fixed with 4% PFA, permeabilzed with 0.3% Triton X-100 in PBS, blocked with 10% serum, and incubated with Mouse anti-Flag Tag monoclonal antibody (CST#8146S) at 37℃ 1 hour. Then cells were stained with Goat Anti-mouse IgG secondary antibody. The fluorescent signal is detected by fluorescence microscope. Each expression experiment has negative control.
Human CHI3L1 / YKL40 ORF mammalian expression plasmid, C-Flag tag
FLAG Tag Info

FLAG-tag, or FLAG octapeptide, is a polypeptide protein tag that can be added to a protein using recombinant DNA technology. It can be used for affinity chromatography, then used to separate recombinant, overexpressed protein from wild-type protein expressed by the host organism. It can also be used in the isolation of protein complexes with multiple subunits.

A FLAG-tag can be used in many different assays that require recognition by an antibody. If there is no antibody against the studied protein, adding a FLAG-tag to this protein allows one to follow the protein with an antibody against the FLAG sequence. Examples are cellular localization studies by immunofluorescence or detection by SDS PAGE protein electrophoresis.

The peptide sequence of the FLAG-tag from the N-terminus to the C-terminus is: DYKDDDDK (1012 Da). It can be used in conjunction with other affinity tags, for example a polyhistidine tag (His-tag), HA-tag or Myc-tag. It can be fused to the C-terminus or the N-terminus of a protein. Some commercially available antibodies (e.g., M1/4E11) recognize the epitope only when it is present at the N-terminus. However, other available antibodies (e.g., M2) are position-insensitive.

Product nameProduct name

Chitinase-3-like protein 1 (CHI3L1) is a secreted heparin-binding glycoprotein whose expression is associated with vascular smooth muscle cell migration. CHI3L1 is expressed at high levels in postconfluent nodular VSMC cultures and at low levels in subconfluent proliferating cultures. CHI3L1 is a tissue-restricted, chitin-binding lectin and member of glycosyl hydrolase family 18. In contrast to many other monocyto / macrophage markers, its expression is absent in monocytes and strong induced during late stages of human macrophage differentiation. Elevated levels of CHI3L1 are associated with disorders exhibiting increased connective tissue turnover, such as rheum atoid, arthritis, osteoarthritis, scleroderma, and cirrhosis of liver, but is produced in cartilage from old donors or patiens with osteoarthritis. CHI3L1 is abnormally expressed in the hippocampus of subjects with schizophrenia and may be involved in the cellular response to various environmental events that are reported to increase the risk of schizophrenia.

  • Zhao XZH, et al. (2007) Functional Variants in the Promoter Region of Chitinase 3-Like 1 (CHI3L1) and Susceptibility to Schizophrenia.The American Journal of Human Genetics. 80 (1): 12-18.
  • Rehli M, et al. (2003) Transcriptional Regulation of CHI3L1, a Marker Gene for Late Stages of Macrophage Differentiation . The Journal of Biological Chemistry. 278: 44058-67.
  • Nishikawa KC, et al. (2003) gp38k (CHI3L1) is a novel adhesion and migration factor for vascular cells. Experimental Cell Research. 287 (1): 79-87
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