![The Jackson Laboratory on Twitter: "The 2019 JAX Mice, Clinical & Research Services catalog is here: https://t.co/cpKl019spY https://t.co/gx4CIffdCY" / Twitter The Jackson Laboratory on Twitter: "The 2019 JAX Mice, Clinical & Research Services catalog is here: https://t.co/cpKl019spY https://t.co/gx4CIffdCY" / Twitter](https://pbs.twimg.com/media/Denz9G4UYAA_dgY.jpg)
The Jackson Laboratory on Twitter: "The 2019 JAX Mice, Clinical & Research Services catalog is here: https://t.co/cpKl019spY https://t.co/gx4CIffdCY" / Twitter
![History of C57BL/6 substrain. C.C. Little established C57BL in 1921.... | Download Scientific Diagram History of C57BL/6 substrain. C.C. Little established C57BL in 1921.... | Download Scientific Diagram](https://www.researchgate.net/publication/318612599/figure/fig1/AS:518738937561088@1500688408659/History-of-C57BL-6-substrain-CC-Little-established-C57BL-in-1921-C57BL-6-was-isolated.png)
History of C57BL/6 substrain. C.C. Little established C57BL in 1921.... | Download Scientific Diagram
![The Jackson Laboratory on Twitter: "Let us do the work! Aged C57BL/6J males and females are now available for order immediately: https://t.co/EnmhDhM5wv https://t.co/3rRGUsCnpw" / Twitter The Jackson Laboratory on Twitter: "Let us do the work! Aged C57BL/6J males and females are now available for order immediately: https://t.co/EnmhDhM5wv https://t.co/3rRGUsCnpw" / Twitter](https://pbs.twimg.com/media/CxZ2iBnVEAAKWVR.jpg)