Sea Urchin solutions

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NaCl
KCl
CaCl2*2H2O MgCl2*6H2O MgCl2*7H2O NaHCO3
dH2O to 1 liter

0.5 M KCl

24.72 g
0.67 g
1.36 g
4.66 g
6.29 g
0.18 g

4 mg/ml soybean trypsin inhibitor

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2. Add 100 ul AP substrate to tubes. Check for staining after 10 minutes by transfering to depression slide (no cover slip) and observing on 4X. To stop the reaction, return to tube and add 0.5 ml PBS.

3. Allow embryos to settle for 10 minutes. Remove buffer to about 100 ml and observe using depression slide.

Note: Use wide-bore pipet tips (Cell-saver).

©Cebra-Thomas, 2001