Ptger1^tm1Dgen

将细菌的lacZ基因插入，使其由内源性基因启动子驱动β-半乳糖苷酶的表达。RT-PCR分析在所有检测的组织中都检测到了基因转录，但这个等位基因的β-半乳糖苷酶表达在肾脏和睾丸中可被检测到。 (Source: The lacZ gene from a bacterial strain was inserted with its endogenous promoter driving expression of beta-galactosidase. RT-PCR revealed gene transcript in all tissues examined, while beta-galactosidase activity from this specific allele was observed in kidneys and testes.)