This kit can be used for tissue samples. To homogenize, please proceed as follows:
Homogenize the tissue sample in assay buffer using the following protocol:
Start with approximately 10 mg of tissue (the amount may need to be optimized), wash in cold PBS and resuspend in ~100 uL of assay buffer provided with the kit.
Homogenize using a Dounce homogenizer or a pestle, on ice to keep the sample cold (10-15 passes).
Centrifuge at 4°C in a cold microcentrifuge to remove insoluble.
Collect the supernatant and keep it on ice throughout sample preparation.
Use a few different volumes of this supernatant (between 2 and 50 uL) and bring them up to a total volume of 50 µl/well with Glucose Assay Buffer in a 96-well plate, as recommended for a typical liquid sample.
The reason for trying different volumes of samples is to ensure the readings are within the standard curve range.
Then proceed with the 'Assay Reaction' step.
Please see the datasheet below for the assay reaction step:
https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/275/602/mak263bul.pdf