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Fig. 2. Activation of muscle-specific cardiac actin genes requires a threshold quantity of injected Xbra RNA. Embryos at the 1-cell stage were injected with the indicated quantities of Xbra RNA. Animal caps were dissected from these embryos at the mid-blastula stage and cultured to stage 17/18. RNA was analyzed for expression of cardiac (muscle-specific) actin by RNAase protection. Image published in: O'Reilly MA et al. (1995) Copyright © 1995. Image reproduced with permission of the publisher and the copyright holder. This is an Open Access article distributed under the terms of the Creative Commons Attribution License. Larger Image Printer Friendly View

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