What is the most suitable kit for Cytoplasmic RNA extraction?"

For isolation of Cytoplasmic RNA from animal cells or eukaryotic cells, the Total RNA Mini Kit (Blood/Cultured Cell) will satisfy this requirement. Extra buffer (not included in the kit) will have to be prepared to lyse the plasma membrane before proceeding with the regular protocol. Plasma Lysis Buffer Components: (Pre-cool to 4°C) 50 mM Tris-Cl, pH 8.0 140 mM NaCl 1.5 mM MgCl2 0.5% (v/v) Nonidet P-40‡ (1.06 g/ml). Just before use, add: 1,000 U/ml RNase inhibitor 1 mM DTT. Add Buffer to lyse plasma membrane: For pelleted cells, loosen the cell pellet thoroughly by flicking the tube. Carefully resuspend cells in 175 µl cold (4°C) Plasma Lysis Buffer, and incubate on ice for 5 minutes.