Specifically engineered for immunological research, this variant is a key molecular probe for deciphering the Structure-Activity Relationship (SAR) of TLR4 receptors.Compared to the potent hexa-acyl (6A) version, the 4A variant exhibits minimal activity in human immune cells and functions as a potential TLR4 antagonist. It holds significant promise as a therapeutic lead for autoimmune and allergic diseases.Quality level: Research grade