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Schematic view of FSHα and FSHβ expression vectors. The vectors include the complete DNA sequences of the FSHα and FSHβ genes, along with the Neo gene and its promoter and terminator. Solid boxes represent exons. The red arrows represent LoxP, and the homologous arms are represented in blue. PCR primers (FSHα-5-453-F/R, FSHβ-5-737-F/R and Neo-382-F/R) are represented by black arrows. Southern blot probes are indicated by the label “probe”. NotI was the restriction enzyme cutting site
