Human CD22 Ready-To-Use IHC Kit

Cat. No.: IHC0556H
Sample Type: FFPE tissue
Size: 50T (including a control slide)
Storage and Stability: Please store components at the temperatures indicated on the individual tube labels. The kit is stable for 6 months from the date of receipt.

Background

CD22, also known as BL-CAM, is a type I transmembrane glycoprotein composed of two polypeptide chains, CD22alpha and CD22beta, with molecular weights of 130 and 140 kDa, respectively. These chains are produced by alternative splicing of the CD22 gene. CD22 is prominently expressed on mature B cells and B cell lymphomas, including hairy cell leukemia, diffuse large B-cell lymphoma, and nodular lymphocyte predominance Hodgkin's lymphoma, but is negative in classical Hodgkin's lymphoma. The extracellular portion of CD22 contains seven Ig-like domains that preferentially bind alpha2,6-linked sialic acid moieties found on epithelial, endothelial, B, and T cells. This binding can be masked by cis interactions with sialic acids on the same cell surface. CD22 expression is limited to late stages of B-cell differentiation, making it useful for phenotyping mature leukemias. Intracellularly, CD22 features six tyrosine residues within immunotyrosine-based inhibitory motifs (ITIM) and activation-like motifs. These residues are phosphorylated upon B-cell receptor engagement, allowing CD22 to regulate B-cell receptor signaling. CD22 participates in positive regulation through interactions with Src family tyrosine kinases and acts as an inhibitory receptor by recruiting cytoplasmic phosphatases via SH2 domains, which block signal transduction through dephosphorylation of signaling molecules. CD22's role in both positive and negative regulation of B-cell signaling, along with its specific expression pattern, makes it a valuable marker for antibody customers interested in B-cell-related research and diagnostics.

Synonyms

Materials Supplied

Number	Component	50T	Concentration	Storage
1	PBS Buffer (powder)	2L x 2	20x	RT
2	Antigen Retrieval Buffer	20ml	100x	2-8°C
3	Endogenous Peroxidase Blocking Buffer	3ml	RTU	2-8°C
4	Blocking Buffer	3ml	RTU	2-8°C
5	Primary Antibody (Human CD22 Recombinant Rabbit mAb)	6ml	RTU	2-8°C
6	Secondary Antibody (Goat Anti-Rabbit IgG H&L, HRP conjugated)	6ml	RTU	2-8°C
7	Chromogen Component A	0.3ml	RTU	-20°C
8	Chromogen Component B	0.3ml	RTU	-20°C
9	Counter Staining Reagent	5ml	RTU	RT
10	Differentiation Reagent	6ml	RTU	RT
11	Mounting Media	5ml	RTU	RT
12	Control slide (Human tonsil)	1 slide	RTU	RT
13	Datasheet	1 copy

Notes

1. The positive control slide provided in the kit allows you to be sure that the experimental set-up is working properly.
2. Do not allow slides to dry at any time during this procedure.
3. Please don't replace the matching reagents in this product with other manufacturers' products.
4. As DAB is a carcinogen, please take necessary precautions.
5. PBS (reagent 1) can be stored for one week at 4℃ after preparation; The antigen retrieval buffer (1×reagent 2) and the chromogenic agent (the mixture of reagents 7 and 8) should be prepared right before each assay.

As DAB is a carcinogen, please take necessary precautions.

Important Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.