| Primary Identifier | MGI:1856133 | Allele Type | Spontaneous |
| Gene | Sptbn4 | Inheritance Mode | Recessive |
| Strain of Origin | D2XB-Pitpna<vb> | Is Recombinase | false |
| Is Wild Type | false |
| molecularNote | This spontaneous mutation was proven allelic with the original quivering mutation by a noncomplementation test. Sequencing of the Spnb4 gene only detected three silent third-base polymorphisms in the coding region and these polymorphisms can be identified in unaffected inbred strains. |