20.109(S07): TA's notes for module 2

Ca Sensor Module

Daily Notes

Notes:M2D1

1. No quiz needed
2. Will need 14 flasks of MES cells/lab as well as appropriate media for splitting cells. If more than 12 students are in lab section, add additional flask for each additional student.
3. Cells for microscope refresher can be from demo of trypsinization for first group on scopes and from students own trypsinized cells for second group on scopes.

Notes:M2D2

1. Need lab quiz.
2. Will need 6 flasks of MES cells/lab section as well as pre-transformation media for plating on slides.
3. Will need at least 12 Lab-Tek slides per section.

Recipes/Reagents

1. Growth Media: 500 ml DMEM (high glucose), 50 ml serum (FBS from Atlanta Biol), 5 ml P/S/G, 1 ml BME, 5 ml NEAA. Filter then add 50 ul LIF. Store 4°
2. Pre-Tx’n Media: 500 ml DMEM (high glucose), 50 ml serum (FBS from Atlanta Biol), 5 ml 100XG, 1 ml BME, 5 ml NEAA. Filter then add 50 ul LIF. Store 4°
3. 0.1% gelatin for TC dishes >10’ before adding cells: 1g/L, Heat slightly to dissolve. Autoclave. Store 4°
4. Cyproheptadine hydrochloride (C6022); Working conc should be 0.1uM. Make stock of 0.1M by dissolving 100 mg bottle in 3 ml DMSO (although according to Sigma this is water soluble, I had trouble dissolving this in water). When using this stock dilute 1:1000 then final concentration of 1:1000 on cells. Store -20°
5. A23187 Calcium Ionophore (C9275). Working conc should be 2 uM. Make stock of 2 mM by dissolving 5 mg bottle in 4.6 ml DMSO. Use at 1:1000 on cells. Store -20°
6. BAPTA-AM (A1076). Working conc should be 30 uM. Make stock of 30 mM by dissolving 25 mg bottle in 1 ml DMSO. Use at 1:1000 on cells. . Store -20°
7. CaCl2*2H20 (Mallinckrodt 4160). Working conc should be 30mM. Make stock of 3M by dissolving 4.41g in 10 ml H20. Filter sterilize. Use at 1:100 on cells. Store -20°
8. EGTA (JTBaker L657-05) Working conc should be 0.5mM. Make stock of 0.5M by dissolving 1.9 g in 9 ml H20 + 1 ml 10N NaOH. Filter sterilize. Use at 1:1000 on cells. Store -20°
9. CaCl2 (no H20) for std curve: 55 mg/50 ml H20 gives 10mM solution.