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netLibrary - eBook Summary Structure-based Drug Design by ...

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All effects of the IL-1 family are exerted via their receptors, which are present on a variety of different<br />

cell types. There are two known IL-1 receptors. The first, type I (IL-1RI) is an 80-kDa formation found<br />

mainly on T cells and fibroblasts; the second, type II (IL-1RII) is present on B cells, monocytes,<br />

neutrophils, and heptoma cells and is approximately 60 kDa in size. From sequence analysis these<br />

molecules are believed to belong to the Ig-superfamily, the extracellular portion of the receptors<br />

consisting of three immunoglobulin-like domains of approximately 100 residues each [27,28]. The IL-<br />

1RI receptor<br />

http://legacy.netlibrary.com/nlreader/nlReader.dll?bookid=12640&filename=Page_399.html (2 of 2) [4/5/2004 5:44:09 PM]

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