Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to perform an absorption based assay [title] Read the assay instruction sheet before starting the experiment. [substeps] Gather all materials and equipment needed to perform the experiment. [title] Plan out how much of each material will be needed to obtain the desired concentrations and which wells of the microplate to put it in.

Ending1: [title] Calculate at least how many chunks of microplate per 100 gallons. [step] For x (169x10 square) there is no limit on how many lumps of microplate per 100 gallons. Ending2: [substeps] Follow the instruction sheet in order to create the right mixtures of chemicals. [title] Add in the necessary reagents (enzymes, buffer solution, etc. Ending3: [substeps] Ask for an assay ruler before placing it in the experiment. [title] Determine a diagnostic baseline for each material. Ending4: [title] Place the sheet of silica gel gel into the autosepotting system. [step] This can be purchased from a local pet store or made by hand.

Answer format: ending1/ending2/ending3/ending4