part of part of mitochondrial inner membrane mitochondrial crista cristae cellular_component See also the cellular component term 'mitochondrial inner membrane ; GO:0005743'. NIF_Subcellular:sao333328131 GO:0030061 mitochondrial cristae Any of the inward folds of the mitochondrial inner membrane. Their number, extent, and shape differ in mitochondria from different tissues and organisms. They appear to be devices for increasing the surface area of the mitochondrial inner membrane, where the enzymes of electron transport and oxidative phosphorylation are found. Their shape can vary with the respiratory state of the mitochondria. cellular anatomical entity cellular anatomical structure