Figure 1. Phase contrast microscopy of NB cell line treated or not with ATRA.
(A) SJ-N-KP control cells. (B) SJ-N-KP cells treated with 10 µM ATRA for 24 hours. (C) SJ-N-KP cells treated with 10 µM ATRA for 9 days. Magnification: 40×.
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