| Primary Identifier | MGI:3790753 | Allele Type | Targeted |
| Attribute String | Humanized sequence, Inserted expressed sequence | Gene | Hbb |
| Transmission | Germline | Strain of Origin | Not Specified |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | The major and minor beta chains were replaced with a construct made of a 5.66 kb fragment of the human gamma chain including 1400 bp of 5' flanking sequence and a 4.1 kb fragment of the sickle cell form of human HBB in ES cells already containing a replacement of Hba complex with human HBA, Hbatm1(HBA)Tow. Cre-mediated recombination removed the floxed hygro cassette. |