immunohistochemical staining with two different monoclonal antibodies against type ii collagen , as well as with an affinity-purified polyclonal antibody , is detectable in the basement membranes of the neural tube , notochord , auditory vesicle , dorsal/lateral surface ectoderm , lateral/ventral gut endoderm , mesonephric duct , and basal surface of the splanchnic mesoderm subjacent to the dorsal aorta , and at the interface between the epimyocardium and endocardium of the developing heart .
C0014124
endocardium
C0018787
heart