... assay.HPLC analysis of the synthesis and release of DA by RPE cellsFigure 5HPLC analysis of the synthesis and release of DA by RPE cells.(A) HPLC analysis of standard of DA, 3,4-dihy-droxyphenylacetic ... sepa-rated and cultured by QG. DY, LL and SC gave advises on the work and helped in the interpretation of the data. WLsupervised all the work and wrote the paper together withMM. All authors read and ... counted using a field lens, and the size of field was 4 mm2 and 10 fields consisted of about 35% of the whole surface of the cultured well. For 6-OHDA treatment, the VM cultures were treatedunder...