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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Classification of CREs identified in the promoters of APSGS genes; the x-axis represents the 11 groups of CREs classed by function; the y-axis indicates the CRE frequency: average sites per promoter.