Fig. 2.
Fig. 2. β-gal Histochemical staining of GM colonies from ROSA 26 and B6/129 F2 BM. GM colonies on an agar base were incubated in the presence of X-gal. A GM colony from B6/129 F2 marrow shows no blue staining, indicating the absence of β-gal activity (A). A GM colony from ROSA 26 marrow stains uniformly bright blue (B).

β-gal Histochemical staining of GM colonies from ROSA 26 and B6/129 F2 BM. GM colonies on an agar base were incubated in the presence of X-gal. A GM colony from B6/129 F2 marrow shows no blue staining, indicating the absence of β-gal activity (A). A GM colony from ROSA 26 marrow stains uniformly bright blue (B).

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