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Summary: Plethodontid modulating factor, a hypervariable
salamander courtship pheromone in the three-finger
protein superfamily
Catherine A. Palmer1
, David M. Hollis1
, Richard A. Watts1
, Lynne D. Houck1
, Maureen A. McCall2
,
Ronald G. Gregg3
, Pamela W. Feldhoff3
, Richard C. Feldhoff3
and Stevan J. Arnold1
1 Department of Zoology, Oregon State University, Corvallis, OR, USA
2 Department Psychological and Brain Sciences, University of Louisville, KY, USA
3 Department Biochemistry and Molecular Biology, School of Medicine, University of Louisville, KY, USA
The proteins in the three-finger protein superfamily are
highly variable but all share a relatively simple struc-
ture termed a `three-finger' fold. This three-dimen-
sional structure consists of three adjacent `finger-like'
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