The ways in which stem cells undertake asymmetric cell division—a approach that results in a single cell destined to remain a stem cell and just one cell destined to differentiate right into a specialised cell variety.
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Barcelona wanted depth at No. 9 in January 2019, and somehow ended up shifting for Boateng, 31 at the time and with no real track record of playing as an out-and-out striker. He had done well there with Sassuolo that season, which is what prompted Barca's interest, but it proved one other wasted