| Primary Identifier | MGI:2429651 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Cd200 |
| Transmission | Germline | Strain of Origin | C57BL/6 |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | A portion of exon 3 was replaced by a neomycin selection cassette. Protein expression was examined by immunohistochemical and flow cytometric analyses and determined to be absent in the CNS, B cells, follicular dendritic cells, and splenic endothelium of homozygous mutant mice. |