... forms of bc1assembly factors [ 12, 29, 32, 41]. Of course, the possibility that other protein components of the respi-ratory chain, such as subunits of the cytochrome coxidase, or of the TIM23 ... the inser-tion of ISP into the bc1sub-complex, but the presence of only one of these two subunits does not substitute for the other. After the addition of ISP, the binding of the last subunit ... ade2–1, leu2–3,1 12, qcr9D2::HIS3, qcr10D2::LEU2 [27 ]DQCR6 ⁄ DQCR9 MATa, leu2–3,1 12, his3, qcr6D::LEU2, qcr9D2::HIS3 Present studyDISP ⁄ DQCR6 MATa, ade2–1, his3–11,15, trp1–1, leu2–3,1 12, ura3–1,...