Figure 1C. Copyright: This image is from [doi:10.1002/cne.10983] Stein V; Hermans-Borgmeyer I; Jentsch TJ; Hubner CA, "Expression of the KCl cotransporter KCC2 parallels neuronal maturation and the emergence of low intracellular chloride." J Comp Neurol 2004 Jan 1;468(1):57-64. Reprinted with permission of Wiley-Liss Inc. [PMID:14648690]