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出典:Wiktionary
sponge + -in
spongin (複数形 spongins)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/05 04:29 UTC 版)
Spongin, a modified type of collagen protein, forms the fibrous skeleton of most organisms among the phylum Porifera, the sponges. They are secreted by sponge cells known as spongocytes
Spongin