CD34 Antibody [Unconjugated]

Western blot shows lysates of human testies tissue and human thymus tissue. PVDF membrane was probed with 0.5 µg/mL of Sheep Anti-Human CD34 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF7227) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for CD34 at approximately 110 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

CD34 was detected in immersion fixed paraffin-embedded sections of human liver using Sheep Anti-Human CD34 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF7227) at 1.7 µg/mL overnight at 4 °C. Tissue was stained using the Anti-Sheep HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS019) and counterstained with hematoxylin (blue). Specific staining was localized to endothelial cells in vasculature. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.

sAng-2 concentration positively relates with Ang-2 expression on the epithelia and MVD in cervical tissues.Representative immunohistochemical staining of Ang-1 (A), Ang-2 (B) and CD34 (C) in 25 cervical cancer tissue specimens and 10 normal controls. Black arrows denote positively stained epithelial cells, whereas red arrows denote positively staining endothelial cells, all appearing brown. Scale bar, 20 µm. (D) sAng-2 is significantly higher in the patients with positive Ang-2 expression on cervix epithelia than those with negative Ang-2 expression. The scatter diagrams show the correlations of sAng-1 (E), sAng-2 (F) and sAng-1/ sAng-2 ratio (G) to MVD in the 35 cervical tissue specimens. Image collected and cropped by CiteAb from the following publication (//pubmed.ncbi.nlm.nih.gov/28584715), licensed under a CC-BY license. Not internally tested by R&D Systems.

• Reactivity: Hu
• Applications: WB, IHC
• Clonality: Polyclonal
• Host: Sheep
• Conjugate: Unconjugated
• Concentration: LYOPH

CD34 Antibody [Unconjugated] Summary

• Immunogen: Chinese hamster ovary cell line CHO-derived recombinant human CD34
  Ser32-Thr290
  Accession # P28906
• Specificity: Detects human CD34 in direct ELISAs. In direct ELISAs, less than 1% cross-reactivity with recombinant mouse CD34 and recombinant rat CD34 is observed.
• Source: N/A
• Isotype: IgG
• Clonality: Polyclonal
• Host: Sheep
• Gene: CD34
• Purity Statement: Antigen Affinity-purified

Applications/Dilutions

• Dilutions:
  • Immunohistochemistry 5-15 ug/mL
  • Western Blot 0.5 ug/mL

Packaging, Storage & Formulations

• Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
• Buffer: Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
• Preservative: No Preservative
• Concentration: LYOPH
• Reconstitution Instructions: Sterile PBS to a final concentration of 0.2 mg/mL.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for CD34 Antibody [Unconjugated]

• CD34 antigenhematopoietic progenitor cell antigen CD34
• CD34 molecule
• CD34
• HPCA1

Background

CD34 is a 105-115 kDa member of the CD34/podocalyxin family of molecules. It is a sialomucin type glycoprotein, and presents carbohydrate to selectins during cell migration. CD34 is found on mast cells, eosinophils, vascular endothelial cells, stem cells and renal mesangial cells. Mature human CD34 is a 354 amino acid (aa) type I transmembrane protein (aa 32-385). It contains a 259 aa extracellular region (aa 35-287) with utilized N- and O-linked glycosylation sites, and a 74 aa cytoplasmic domain that may undergo Tyr phosphorylation. There is one splice variant that shows a four aa substitution for aa 325-385. Human CD34 can undergo membrane cleavage by bacterial proteases to generate 30-40 kDa soluble fragments. And notably, desialylated CD34 shows a 40 kDa increase in MW (to 150 kDa) when run in SDS-PAGE. Over aa 32-290, human CD34 shares 56% aa identity with mouse CD34.

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.

Publications for CD34 Antibody (AF7227)(8)

Publications using AF7227

• Fukumoto, K;Kanatani, S;Jaremko, G;West, Z;Li, Y;Takamatsu, K;Al Rayyes, I;Mikami, S;Niwa, N;Axelsson, TA;Tanaka, N;Oya, M;Miyakawa, A;Brehmer, M;Uhlén, P; Three-dimensional imaging of upper tract urothelial carcinoma improves diagnostic yield and accuracy JCI insight 2024-07-22 [PMID: 39133649] (Immunohistochemistry, Mouse)
• Choudhury, A;Cady, M;Lucas, C;Najem, H;Phillips, J;Palikuqi, B;Zakimi, N;Joseph, T;Birrueta, J;Chen, W;Bush, N;Hervey-Jumper, S;Klein, O;Toedebusch, C;Horbinski, C;Magill, S;Bhaduri, A;Perry, A;Dickinson, P;Heimberger, A;Ashworth, A;Crouch, E;Raleigh, D; NOTCH3 drives meningioma tumorigenesis and resistance to radiotherapy bioRxiv 2023-01-01 [PMID: 37503127] (IHC, Human)
• Karol Nowicki-Osuch, Lizhe Zhuang, Tik Shing Cheung, Emily L. Black, Neus Masqué-Soler, Ginny Devonshire et al. Single-Cell RNA Sequencing Unifies Developmental Programs of Esophageal and Gastric Intestinal Metaplasia Cancer Discovery 6/2/2023 [PMID: 36929873]
• K Pandit, J Petrescu, M Cuevas, W Stephenson, P Smibert, H Phatnani, S Maniatis An open source toolkit for repurposing Illumina sequencing systems as versatile fluidics and imaging platforms Scientific Reports, 2022-03-24;12(1):5081. 2022-03-24 [PMID: 35332182] (IHC, Human)
• Cao J, O'Day DR, Pliner HA et al. A human cell atlas of fetal gene expression Science 11/13/2020 [PMID: 33184181]
• B Di Marco, EE Crouch, B Shah, C Duman, MF Paredes, C Ruiz de Al, EJ Huang, J Alfonso Reciprocal Interaction between Vascular Filopodia and Neural Stem Cells Shapes Neurogenesis in the Ventral Telencephalon Cell Rep, 2020-10-13;33(2):108256. 2020-10-13 [PMID: 33053356] (IHC, Human)
• DL Coutu, KD Kokkaliari, L Kunz, T Schroeder Multicolor quantitative confocal imaging cytometry Nat. Methods, 2017-11-13;15(1):39-46. 2017-11-13 [PMID: 29320487] (IHC, Mouse)
• Z Li, Q Wang, W Mi, M Han, F Gao, G Niu, Y Ma Effects of negative-pressure wound therapy combinedwith microplasma on treating wounds of ulcer and the expression of heat shock protein 90 Exp Ther Med, 2017-03-27;13(5):2211-2216. 2017-03-27 [PMID: 28565829] (IHC-P, Human)

FAQs for CD34 Antibody (AF7227). (Showing 1 - 1 of 1 FAQs).

1. I wonder if you have a CD105 or CD34 antibody suitable for IHC that is specific for human and do not bind mouse?
   • We do not have any anti-human CD34 or CD105 antibodies that are confirmed to NOT detect the mouse protein. When we have tested an antibody and confirmed that it will not react with mouse samples, we will add Mu(-) to the datasheet, and unfortunately all of our CD105 and CD34 antibodies will either detect the mouse protein, or they have not been used in mouse samples before.

Bioinformatics

• Gene Symbol: CD34
• Uniprot:
  • P28906()