The putative ADP/ATP carrier of C. parvum is homologous to mitochondrial ADP/ATP carriers. Alignment of CpAAC with the mitochondrial ADP/ATP carrier of Bos taurus (BtAAC1), Homo sapiens (HsAAC1), Saccharomyces cerevisiae (ScAac2p), Thermothelomyces thermophila (TtAac), and Entamoeba histolytica (EhAAC). The transmembrane α-helices (H1-6), linker α-helices (l12, l34, l56), and matrix α-helices (h12, h34, h56) are indicated. Repeats 1, 2, and 3 are colored in pastel blue, yellow, and red, respectively. The residues of the Pro-kink (P, brown), matrix network (MN, red and blue), glutamine-brace (Q, cyan), substrate binding site (green), contact points (black circles), tyrosine-brace (Y, cyan), and cytoplasmic network (CN, red and blue) are indicated.