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细胞周期同步诱导方法.doc


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DIAMONDS Deliverable 1-.3
State-of-the-art in human cell synchronization.
DIAMONDS PARTNER: Kristian Helin,
Biotech Research and Innovation Centre (BRIC), University of Copenhagen , Denmark
Synchronization protocols for human cells
I.) Double Thymidine block (early S-phase block)
at 25-30% confluency of HeLa cell culture wash twice with 1xPBS and add DMEM (10%FCS, 1% Pen-Strep, 1% Glutamine) + 2mM Thymidine for 18 h (first block)
after first Thymidine block: remove Thymidine by washing with 1xPBS;
add fresh DMEM (10%FCS, 1% Pen-Strep, 1% Glutamine) for 9h to release cells
ﻩ  
after releasing: add DMEM (10%FCS, 1% Pen-Strep, 1% Glutamine) + 2mM Thymidine for 17 h (second block)
after second block: remove Thymidine by washing with 1xPBS; release cells by adding fresh DMEM (10%FCS, 1% Pen-Strep, 1% Glutamine) 
ﻩ    Þ cells progress synchronously through G2- and mitotic phase
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Figure A.   Synchrony of HeLa cells. (A) Cells were arrested at the beginning of S phase by using a double thymidine block, and cell synchrony was monitored by flow cytometry of propidium iodide-stained cells. Flow cytometry data were collected for each of the three independent double thymidine blocks performed in this study; data are shown only for the second double thymidine arrest (Thy-Thy2), although equivalent synchrony was obtain

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