This is a full-and-open commercial solicitation for a brand name or equal multiplexed precision proteomics immunoassay panel and bulk reagents compatible with the ARGO HT System, used for neurological disease biomarker research. The requirement includes 7 NULISAseq Neuro 220 Panels and 2 NULISA 10X Wash Buffers, with delivery to the National Institute on Aging in Baltimore, Maryland. Delivery must be made within 30 days after receipt of order. The government will award based on technical capability, price, and past performance, with technical and past performance combined significantly more important than price. Offerors must be registered in SAM and submit detailed pricing and capability information.