Ball, J K A modified alkaline phosphatase enzyme amplification system and its application in an HIV antigen ELISA. [electronic resource] - Journal of virological methods May 1992 - 149-53 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0166-0934 Standard No.: 10.1016/0166-0934(92)90042-c doi Subjects--Topical Terms: Alkaline Phosphatase--standardsEnzyme-Linked Immunosorbent Assay--standardsHIV Core Protein p24--analysisLevamisoleSubstrate Specificity