Fig. 1: Structure of an NCLX protomer.
From: Structure and mechanism of the mitochondrial calcium transporter NCLX

a, Structure of an NCLX protomer. The ribbon representations of the NCLX protomer (in a matrix open conformation) are viewed from membrane and intermembrane space, respectively. b, The overall architecture of an NCLX protomer. c, The topology of NCLX.