Question

What is spongin ?

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Answer 1

Answer:

Spongin, a modified type of collagen protein, forms the fibrous skeleton of most organisms among the phylum Porifera, the sponges. It is secreted by sponge cells known as spongocytes. Spongin gives a sponge its flexibility. True spongin is found only in members of the class Demospongiae.

Answer 2

Answer

A scleroprotein that is the chief constituent of flexible fibers found in certain sponge skeletons.

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