I have samples frozen at -80 since 2015 in a freezing medium,
I thaw one sample quickly at 37c for 2 minutes then I dump it into pre-warmed PBS about 40 mls and miz it by inverting and then centrifuge it at 1000 rpm for 5 minutes and there was no pellet!!
I tried also to thaw rapidly >> spin >> again no pellet..
I would appreciate it if you kindly provide me with the appropriate protocol..
Thank you