TBA assay | TLC | Radiochemical method | 1H-NMR | HPLC | Fluorescence assay | Spectophotometric assay | |
---|---|---|---|---|---|---|---|
Substrates | Sialosides | Sialosides | Sialosides | Sialosides | Sialosides | 4MU-Neu5Ac | p NP-Neu5Ac |
Reagents | Arsenite, TBA | Resorcinol or diphenylamine | Radiolabelled gangliosides | Deuterated buffer | Malonitrile | Normal buffer | Normal buffer |
Instruments | Spectrometer | TLC plate | HPTLC and radiochromatoscanner | NMR facility | HPLC and fluorimeter | Fluorimeter | Spectrophotometer |
Time to run | hours | hours | hours | hours | hours | 10 min | 10 min |
Safety issue | 5TC toxic | Hazardous in case of skin contact | Radioactive substrate | Strong magnet | None | None | None |
Automation | No | No | No | No | Yes | Yes | Yes |
Cost per run | Cheap | Cheap | Expensive | Very Expensive | Expensive | Expensive and substrate unstable | Cheap |
Substrate specificity | Yes | Yes | Yes | Yes | Yes | No | No |
Enzyme kinetics | Inaccurate; Time consuming | Not applicable | Costly; Time consuming | Costly; Time consuming | Costly; Time consuming | Yes | Yes |
Reference(s) | [8] | [9] | [10] | [20] | [12] |