SLLK, as a control peptide for TSP1 inhibitor, is primarily used in research settings to study the mechanisms and effects of thrombospondin-1 (TSP1) inhibition. It serves as a reference compound to validate experimental results, ensuring that observed effects are specifically due to TSP1 inhibition rather than non-specific interactions. Researchers utilize SLLK in assays to compare its activity with that of the actual TSP1 inhibitor, helping to confirm the specificity and efficacy of the inhibitor. This peptide is valuable in studies related to angiogenesis, cancer biology, and tissue repair, where TSP1 plays a significant role. By providing a baseline for comparison, SLLK aids in the accurate interpretation of experimental data, contributing to advancements in understanding TSP1-related pathways and their therapeutic potential.