<a href=http://jaxmice.jax.org/strain/003643.html target=_window><img src=https://eagle-i.net/images/jacksonlabs-button-large.png alt='Order from Jackson Laboratory'></a>
C4 knockout (C4<sup>−/−</sup>) mice were from The Jackson Laboratory (Bar Harbor, ME). "A genomic fragment corresponding to 987 nucleotides of coding sequence (exons 23-29) was replaced with a neomycin selection cassette."
This strain is cryo-preserved.