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Product Description
Ribonuclease Inhibitor is a protein that contains leucine rich repeats.
"Ribonuclease inhibitor (RI) is a large (~450 residues, ~49 kDa), acidic (pI ~4.7), leucine-rich repeat protein that forms extremely tight complexes with certain ribonucleases. It is a major cellular protein, comprising ~0.1% of all cellular protein by weight, and appears to play an important role in regulating the lifetime of RNA."
--http://en.wikipedia.org/wiki/Ribonuclease_inhibitor