Model Description: A 2A-DreERT2-SV40polyA coexpression cassette is inserted befor the stop codon of mouse Aplnr gene via homologous recombination to establish a tamoxifen inducible Aplnr-DreERT2 tool stain. This strain can be used to knockout target gene in Aplnr+ cells after tamoxifen treatment when crossed with mice which carry rox sites flanking target gene.