单词	scleroprotein
释义	scleroprotein /ˌsklɪərə(ʊ)ˈprəʊtiːn / /ˌsklɛrə(ʊ)ˈprəʊtiːn/ noun Biochemistry An insoluble structural protein such as keratin, collagen, or elastin.Sponges have an internal skeleton composed of needle-like elements called spicules, which can be composed of calcium carbonate, opaline silica, or fibres of the scleroprotein spongin.
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