这个句子很长,我需要分几个部分进行翻译。首先,"Enables ammonium transmembrane transporter activity and potassium:chloride symporter activity"可以翻译为“具有铵离子跨膜转运体和钾:氯离子对称载体活性”。接下来,"Involved in several processes, including cation transport; dendritic spine development; and intracellular pH reduction"可以翻译为“参与多个过程,包括阳离子运输、树突棘发育和细胞内pH降低”。然后,"Located in dendrite membrane and perikaryon"可以翻译为“位于树突膜和胞体”。最后,"Human ortholog(s) of this gene implicated in developmental and epileptic encephalopathy 34 and idiopathic generalized epilepsy 14. Orthologous to human SLC12A5 (solute carrier family 12 member 5)"可以翻译为“这个基因的人类同源物与发育性和癫痫性脑病34以及特发性全面性癫痫14有关。与人类SLC12A5(溶质载体家族12成员5)同源”。