CRELD1 in Mouse Embryo. CRELD1 was detected in immersion fixed frozen sections of mouse embryo (E13.5) using Goat Anti-Mouse CRELD1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF4116) at 10 µg/mL overnight at 4 °C. Tissue was stained using the NorthernLights™ 557-conjugated Anti-Goat IgG Secondary Antibody (red; Catalog # NL001) and counterstained with DAPI (blue). Specific staining was localized to the developing heart and is shown at both low (lower panel) and high magnification (upper panel). View our protocol for Fluorescent IHC Staining of Frozen Tissue Sections.