A connection formed between chromatids, visible during meiosis, thought to be the point of the interchange involved in crossing-over.

An electron dense structure that is associated with meiotic chromosomes.

An electron dense structure that is associated with meiotic chromosomes in pachytene during meiosis I.

The dispersed less dense form of chromatin in the interphase nucleus. It exists in at least two forms, a some being in the form of transcriptionally active chromatin which is the least condensed, while the rest is inactive euchromatin which is more condensed than active chromatin but less condensed than heterochromatin.

The double lipid bilayer enclosing the mitochondrion and separating its contents from the cell cytoplasm; includes the intermembrane space.

The outer, i.e. cytoplasm-facing, lipid bilayer of the mitochondrial envelope.

Catalysis of the reaction: succinate semialdehyde + NAD(P)+ + H2O = succinate + NAD(P)H + H+.

mitochondrial outer membrane translocase complex

A large complex of the mitochondrial outer membrane that mediates transport of proteins into all mitochondrial compartments.

The inner, i.e. lumen-facing, lipid bilayer of the mitochondrial envelope. It is highly folded to form cristae.

mitochondrial inner membrane presequence translocase complex

The protein transport machinery of the mitochondrial inner membrane that contains three essential Tim proteins: Tim17 and Tim23 are thought to build a preprotein translocation channel while Tim44 interacts transiently with the matrix heat-shock protein Hsp70 to form an ATP-driven import motor.

Protease complex of the mitochondrial inner membrane that is involved in mitochondrial protein turnover and in processing of proteins imported into mitochondria.

The protein complexes that form the mitochondrial electron transport system (the respiratory chain). Complexes I, III and IV can transport protons if embedded in an oriented membrane, such as an intact mitochondrial inner membrane.

respiratory chain complex I (sensu Eukaryota)