- "Structure
of the insulin receptor, a heterotetramer
consisting of two extracellular insulin-binding
subunits linked by a disulfide bonds to tow
transmembrane beta subunits. The beta subunits
contain an intrinsic tyrosine kinase activity
that is activated upon insulin binding to the
alpha subunit. "
- courtesy of Robert H.
Parsons, Ph.D., Rensselaer Polytechnic Institute,
used with permission
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