obsolete mitochondrial respiratory chain complex I, membrane segment (obsolete GO:0042653)
NADH-Q oxidoreductase complex, membrane segment
broad
OBSOLETE. The mitochondrial membrane segment of respiratory chain complex I. Respiratory chain complex I is an enzyme of the respiratory chain, consisting of at least 34 polypeptide chains. The electrons of NADH enter the chain at this complex. The complete complex is L-shaped, with a horizontal arm lying in the membrane and a vertical arm that projects into the matrix.