Albumin production in 10 μL samples of LO media was measured using an enzyme linked immunosorbent assay (Human Albumin ELISA Quantitation Set, Bethyl laboratories Inc, Montgomery, TX) as per manufacturer’s instructions. Urea secretion was measured using the urease based colorimetric method described in Zawada et al. [17 (link)]. Glucose concentration in 10 μL samples was determined by the Yellow Springs Glucose 2300 STAT as per manufacturer’s instructions. Complete liver organoid growth medium (i.e. upcyte® Hepatocyte Growth Medium and upcyte® LSEC Growth Medium in 1:1 ratio) including all the adjuncts (e.g. FBS), was used as a blank for all readings.
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