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co·he·sin | \ kō-ˈhē-sən 
, -zən \
, -zən \ plural cohesins
Definition of cohesin
: a ring-shaped protein complex that produces cohesion between sister chromatids and mediates their separation during cell division and that also plays a role in repairing damaged replicated DNA and regulating genetic transcription
At the cell-cycle stage known as anaphase, cohesins are cleaved and cohesion between sister chromatids dissolves, triggering their segregation.— Paul Megee
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Time Traveler for cohesin
The first known use of cohesin was in 1998
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