CHO Lec3.2.8.1 cells have 4 independent mutations in the N and O glycosylation pathways. When cultured with alpha-glucosidase I inhibitor N-butyl-deoxynojirimycin, glycoproteins produced in CHO Lec3.2.8.1 cells are completely susceptible to Endo H digestion. Endo H cleaves chitobiose, leaving a single N-linked N-acetylglucosamine per site which is ideal for maintenance of protein solubility and special carb-protein interactions, such as between the first N-acetyl glucosamine residue and tryp. - [Read Establishment of Stable Transfectant of CHO Lec Cells Protocol]
Mice fed with the cytohesin inhibitor SecinH3 for two days develop hepatic insulin resistance that can be identified by reduced liver glycogen levels, increased serum insulin and ketone body levels and decreased serum non-esterified fatty acid. To confirm the presence and identity of SecinH3 in mouse liver, we extracted the compound from liver homogenates with chloroform and identified it by LC/MS. - [Read Extraction of the SecinH3 from Mouse Liver Protocol]
The FAM caspase binding assay kits from ATCC Corporation can be used to determine amounts of active caspases in cells. The FAM-labeled caspase inhibitor can freely diffuse into the cell. Active caspase irreversibly binds the inhibitor. Upon washing the cells, the amount of fluorescence is proportional to the amount of active caspase in the cell. FAM-LETD-fmk (catalog no. 30-1306) is used to detect caspase 8 and FAM-LEHD-fmk (catalog no. 30-1308) is used for caspase 9. - [Read Fam Caspase 8 and 9 Binding Assay for Embryos Protocol]
This protocol provides a method for synchronizing cells at the G1/S border using a double treatment of thymidine, which, in excess, is an inhibitor of DNA synthesis. Cells are treated once with excess thymidine to accumulate the majority of them at G1/S; however, some cells will have stopped growth within the S phase. - [Read G1/S Phase Synchronization using Double Thymidine Synchronization Protocol]
This protocol provides a method for synchronizing cells at the G1/S border using a double treatment of thymidine, which, in excess, is an inhibitor of DNA synthesis. Cells are treated once with excess thymidine to accumulate the majority of them at G1/S; however, some cells will have stopped growth within the S phase. - [Read G1/S Phase Synchronization using Double Thymidine Synchronization Protocol]
This protocol provides a method for synchronizing cells at the G1/S border using a double treatment of thymidine, which, in excess, is an inhibitor of DNA synthesis. Cells are treated once with excess thymidine to accumulate the majority of them at G1/S; however, some cells will have stopped growth within the S phase. - [Read G1/S Phase Synchronization using Double Thymidine Synchronization Protocols]
3' Rapid Amplification of cDNA Ends RACE Using PCR Protocol. This protocol contains the steps for 3' end rapid amplification of mRNA by PCR. The first-strand cDNA is synthesized from total or poly(A+) RNA by priming from the poly-A tail of the mRNA using a oligo (dT) adaptor primer. The cDNA is then amplified via PCR using a gene-specific primer and an adaptor primer.
Histone H1 Kinase Activity Assay Protocol. This protocol describes assaying kinase activity of a putative kinase using Histone H1 as the substrate. Histone H1 is the canonical kinase substrate in this type of assay. Phosphorylation of Histone H1 is assessed by SDS-Polyacrylamide gel electrophoresis followed by autoradiography.
This protocol a protocol on how to generate transfected embryonic stem (ES) cell clones. The previous protocol in this series is the Protocol for Electroporation of ES cells. The next protocol in the series is the Protocol on Disaggregation, Expansion, and Freezing of Transfected ES Clones.