02-15-2023-1358 - C57BL/6, often referred to as "C57 black 6", "C57" or "black 6", is a common inbred strain of laboratory mouse.

C57BL/6, female, 22 weeks old

 

C57BL/6, often referred to as "C57 black 6", "C57" or "black 6", is a common inbred strain of laboratory mouse.

https://en.wikipedia.org/wiki/Fungal_extracellular_enzyme_activity

[zak]