Used in immunological research to detect and quantify the Bb fragment of the complement factor B, this ELISA kit helps assess activation of the alternative complement pathway. It is commonly applied in studies related to inflammation, autoimmune diseases such as lupus or rheumatoid arthritis, and conditions involving dysregulation of the complement system like atypical hemolytic uremic syndrome (aHUS). The kit enables researchers to measure Bb levels in plasma or serum samples, providing insight into disease activity, treatment response, or mechanistic pathways in preclinical models. It is intended for research use only and not for diagnostic procedures.