β-galactosidase expression activated by B6.EIIa-cre in adult heart
 A) Adult (8 weeks old) female heart at 2X magnification. β-gal expression is strong throughout the majority of the heart. |
 B) Adult (8 weeks old) male heart at 2X magnification. β-gal expression is strong but restricted to specific cells in the heart. |
 C) The same section from A, at 20X magnification. |
 D) The same section from B, at 20X magnification. |
| Note: The difference between β-gal expression for the male and female samples are just initial observations. No quantification was conducted to determine if a true sex-based difference is present with the B6.EIIa-cre line. Compare to P7 heart. | |
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