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Contact: Joyce Peterson
Jackson Laboratory

N or J? Black 6 Substrains Have Diverged

Caption: Separated by more than six decades, the C57BL/6N substrain (left) of laboratory mouse has undergone multiple genetic changes due to spontaneous mutations and is now visibly different from the founder strain, the C57BL/6J of The Jackson Laboratory.

Credit: The Jackson Laboratory

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Related news release: Cocaine, meth response differ between 2 substrains of 'Black 6' laboratory mouse

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