after 7 days of culture , the big cell type contained 16 /+- 2.3 acetylcholinesterase ( ache ) positive cells/colony , with a mean ploidy level of 16.8 /+- 0.8/cell and the ploidy distribution characteristic of recognizable megakaryocytes in bone marrow .
C0025166
megakaryocytes
C0005953
bone marrow