Flipkin works with Reduce, Probe and Prekin to help you decide the best “flip state” for asparagine, glutamine, and histidine. Flipkin will generate recommendations as to correct orientation, ‘flip’, of the sidechains of Asn, Gln and His. It will also generate kinemages of the flips and with all-atom contact dots for your selection of the best flip state. The newer version of this script uses perl; an older version using awk rather than perl is also available at right
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Flipkin is free software available under the terms of its own BSD-style license.