Queried GO terms:

  idGO:0055011   Detailed information
  nameatrial cardiac muscle cell differentiation
  namespacebiological_process
  def"The process in which a relatively unspecialized cell acquires specialized features of a cardiac muscle cell in the atrium. Cardiac muscle cells are striated muscle cells that are responsible for heart contraction. The atrium is the part of the heart that receives blood into the organ." [GOC:devbiol, GOC:mtg_heart]
  synonym"atrial cardiomyocyte differentiation" EXACT []
  synonym"atrial heart muscle cell differentiation" EXACT []
  is_aGO:0055007 ! cardiac muscle cell differentiation

No monarch genes has this GO term.