Ppm1f^tm1Dgen

将细菌的lacZ基因插入，使其由内源性基因驱动β-半乳糖苷酶的表达。在所有分析的组织中都检测到了RNA转录，但除了胸腺、骨髓和主动脉，这个等位基因的β-半乳糖苷酶表达在大多数器官中都可检测到。 (Source: The lacZ gene from a bacterial strain was inserted into the native gene with its promoter driving beta-galactosidase expression. RNA transcripts were detected in all tissues, except for thymus, bone marrow, and aorta, where expression from this specific allele was observed.)