The prepared femur sections of newborn C57BL/6 mice were subjected to antigen retrieval with heat-induced antigen retrieval solution (ab973, abcam). The specific IF stain procedure was performed as outlined previously 33 (link). Primary antibodies, goat anti-GPR125 (1:200) (Santa Cruz) and mouse-anti-Ctsk (Santa Cruz, sc-48353) were applied to one section. After overnight incubation, secondary antibodies, TRITC donkey anti-Goat antibody (Thermo Scientific) and FITC donkey-anti-mouse antibody (Thermo Scientific) were used to show the specific expression location. Nuclei were visualized with DAPI (1ug/mL).
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