| Primary Identifier | MGI:2181293 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Hp |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Exons 2-4 were replaced with a neomycin resistance gene via homologous recombination. RT-PCR analysis of liver and Western blot analysis of plasma from homozygous mutant animals verified the absence of gene expression from the null allele. |