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EMBO J. 1986 Jul;5(7):1465-72.

Evidence from molecular cloning that SPARC, a major product of mouse embryo parietal endoderm, is related to an endothelial cell 'culture shock' glycoprotein of Mr 43,000.


We describe the molecular cloning and characterization of a secreted, acidic, cysteine-rich glycoprotein (SPARC) of apparent Mr 43,000 which is a major product of mouse embryo parietal endoderm. These cells are specialized for the synthesis of a rapidly expanding basement membrane, but SPARC is not itself an integral matrix component. We show that SPARC is related structurally and antigenically to an Mr 43,000 glycoprotein secreted in large amounts by bovine aortic endothelial cells as part of a 'culture shock' response to in vitro conditions promoting their proliferation and migration.

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