| Primary Identifier | MGI:2448356 | Allele Type | Targeted |
| Attribute String | Null/knockout | Gene | Syn1 |
| Transmission | Germline | Strain of Origin | 129P2/OlaHsd |
| Is Recombinase | false | Is Wild Type | false |
| molecularNote | Exon 1 was replaced by a neomycin selection cassette inserted by homologous recombination. Western blot analysis of homozygous mutant brain tissues indicated an absence of both protein isoforms, Synapsin Ia and Synapsin Ib, produced by the endogenous locus. |