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. 2015 Feb 15;16:6. doi: 10.1186/s12858-015-0036-7

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© Jensen et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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The proposed model of the 1 :2 CaM /Orai -CMBD complex. The coordinates for the proposed model were obtained as a courtesy from Dr. Birnbaumer. One of two peptides (stick model) forms a partial helix structure and is bound in the hydrophobic patch (primarily gray) formed by CaM-N, shown as an electrostatic potential surface, where Trp76 (cyan) is deeply buried. The other Orai-CMBD shown in cartoon model (green) is flanked by the Ca²⁺-bound (orange) EF-hands in CaM-C.