What is CD45 1 a marker for?

Allelic variants of the pan-haematopoietic cell marker CD45, identified as CD45. 1 and CD45. 2, have been established as a marker system to track haematopoietic cells following congenic mouse bone marrow transplants.

Are B6 mice CD45 1 or CD45 2?

Two isoforms have been identified in mice: the common form is CD45. 2, which is expressed by the C57BL/6 (B6) strain and is encoded by the Ptprcb allele; and an additional allelic variant Ptprca which encodes the CD45. 1 isoform, was identified in the SJL mouse strain. CD45.

What CD45 1?

CD45. 1 is an alloantigen of CD45, expressed by Ly5. 1 bearing mouse strains (e.g., RIII, SJL/J, STS/A, DA). CD45, a member of the protein tyrosine phosphatase (PTP) family, is a 180-240 kD glycoprotein expressed on all hematopoietic cells except mature erythrocytes and platelets.

What is transplantation assay?

Competitive bone marrow transplantation assay measures multi-lineage reconstitution of hematopoiesis in irradiated transplant recipient mice. Thus this assay is routinely used to determine haematopoietic stem and progenitor cells (HSPCs) functionality in vivo.

Do mice express CD45?

Wild-type C57BL/6 inbred mice express the Ptprcb (CD45. 2 or Ly5.

What CD45 2?

CD45. 2 is an alloantigen of CD45, expressed by Ly5. 2 bearing mouse strains (e.g., A, AKR, BALB/c, CBA/Ca, CBA/J, C3H/He, C57BL, C57BR, C57L, C58, DBA/1, DBA/2, NZB, SWR, 129).

Are B6 mice CD45 2?

This research highlights a potential confounder in experimental interpretation of tracking lymphocyte development using CD45. 1 mice strains, under the assumption that the only difference between these mice and CD45. 2 B6 strain is the CD45 isoform.

What is CD45 1/2 system?

The CD45. 1/2 system is commonly used in mouse to discriminate the progeny of transplanted cells from those of the recipient. To distinguish the two genetic alleles, discriminatory antibodies specific for a single lysine to glutamic acid amino acid difference are available (Mercier et al; Stem Cell Reports, 2016).

Why is NCR1 not expressed in CD45 mice?

Loss in expression of NCR in CD45.1 mice was attributed to a point mutation in the start codon of Ncr1 transcripts, which results in the abrogation of Ncr1 mRNA translation to protein and no expression of NCR1 by NK cells.

How many amino acids are in a CD45 molecule in mice?

Lab mouse of strain C57BL/6, female, 22 months of age, while eating a crumb of cake. Au: Alex Weingarten, Wikimedia Commons CD45.1 and CD45.2 C57BL/6 (B6) mice strains often used for in vivo tracking of immune cell development, were previously thought to differ by only five amino acids in the CD45 molecule.

How many alleles of CD45 are there?

There are two identifiable alleles of CD45 in mice: CD45.1 (Ly5.1 historically) and CD45.2 (Ly5.2 historically). Although there are a large number of permutations possible, only six isoforms are traditionally identified in humans.