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

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II. Type IFNs<br />

A great deal of structure/function analysis has been done on the Type I IFNs. One Type I IFN in<br />

particular, IFN-τ has received attention recently because of its lower cytotoxicity compared to the IFNαs.<br />

<strong>Structure</strong>/function studies have concentrated on comparing IFN-τ with IFN-α. Therefore, IFN-τ<br />

provides an excellent example of structure/function studies of the Type I IFNs.<br />

First isolated from the conceptuses of sheep, IFN-τ is the major conceptus secretory protein responsible<br />

for signaling maternal recognition of pregnancy in ruminants [11]. it is produced in large quantities (200<br />

μg in 30 h from a day 16 conceptus culture). The protein was purified using a combination of anion<br />

exchange and molecular sieve chromatography.<br />

http://legacy.netlibrary.com/nlreader/nlReader.dll?bookid=12640&filename=Page_439.html (2 of 2) [4/9/2004 12:10:45 AM]

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