This correction note has been added at the request of the corresponding author.

Clarification in Materials and Methods section

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In the subsection of the Materials and Methods section entitled ‘Producing binding maps with ANCHORSmap’, the detailed description of the ANCHORSmap algorithm derives from reference [56]. Readers wishing to cite the ANCHORSmap method should cite reference [56]: Ben-Shimon A, Eisenstein M (2010) Computational Mapping of Anchoring Spots on Protein Surfaces. J Mol Biol 402: 259–277.

Correction in Discussion section

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The first line of the first paragraph in the Discussion section should read: “We used ANCHORSmap, a novel computational mapping approach developed by Ben-Shimon and Eisenstein [56], specifically designed for the detection of favorable binding positions of amino acid probes on the surfaces of proteins, to investigate the Arg preference determining elements in Ser/Thr protein kinase substrate-binding grooves.”