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Recombinant Immunoglobulin lambda constant 6 (Ig lambda-6 chain C region) fragment (amino acids 1-106) is a high-purity protein designed for studying the Ig-like domain's role in antibody structure and function. This fragment provides an essential tool for investigating humoral immunity mechanisms and antigen binding interactions.

Immunoglobulin lambda constant 6 serves as the constant region of immunoglobulin light chains, which are crucial glycoproteins produced by B lymphocytes. These immunoglobulins function as antigen receptors in the recognition phase of humoral immunity, triggering B cell expansion and differentiation into antibody-secreting plasma cells. The secreted immunoglobulins mediate the effector phase that eliminates bound antigens. Each immunoglobulin's antigen binding site is formed by variable domains from one heavy chain and its associated light chain, with the constant regions providing structural stability. The protein is naturally found both secreted and membrane-bound in human cells, playing a fundamental role in adaptive immune responses through its participation in antibody-mediated pathogen clearance.