Queried GO term:

  idGO:0005759   Detailed information
  namemitochondrial matrix
  namespacecellular_component
  alt_idGO:0031980
  def"The gel-like material, with considerable fine structure, that lies in the matrix space, or lumen, of a mitochondrion. It contains the enzymes of the tricarboxylic acid cycle and, in some organisms, the enzymes concerned with fatty acid oxidation." [GOC:as, ISBN:0198506732]
  is_aGO:0044429 ! mitochondrial part
  is_aGO:0070013 ! intracellular organelle lumen

Monarch genes assigned with this GO terms:

DPOGS2152919.7e-214
DPOGS2008544.2e-53