Reagent Architect™ Metabolic Immunoassay Urine / Cerebrospinal Fluid (CSF) Protein For Architect c16000 / c4000 / c4100 / c8000 / ci16200 / ci8200 Analyzers 209 Tests Abbott's Architect reagent is for use in an assay for the quantitative determination of urine / cerebrospinal fluid (CSF) protein in urine / CSF sample.