Lrp5-/- [42 (link)] and Lrp5a214v(neo)/+ [21 (link)] mice were generated as described. Lrp5fl/fl and Lrp6fl/fl [22 (link)], Flk1Breier-Cre [30 (link)], Rx-Cre [23 (link)] and CD11b-Cre [29 (link)] mice were kindly provided by Drs. Bart O. William, Kevin P. Campbell, Eric Swindell and Roland Baron, respectively. VE-Cad-Cre [24 (link)], Tie2-Cre [25 (link)], LysM-Cre [28 (link)] and tdTomato [27 (link)] mice were purchased from the Jackson Laboratory. Flk1Breier-Cre, Rx-Cre, CD11b-Cre, VE-Cad-Cre and Tie2-Cre mice were all transgenic lines generated by fusing the Cre gene to a fragment of the promoter sequence of Flk1, Rx, CD11b, VE-Cad and Tie2, respectively. LysM-Cre mice were knock-ins, generated by targeted insertion of the Cre cDNA into the endogenous M lysozyme locus. When animals from different genetic backgrounds were crossed, littermate controls were used to avoid confounding effects.
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