SiR-lysosome is based on the cathepsin D binding natural product pepstatin A. SiR-lysosome is fluorogenic, cell permeable and highly specific for lysosomes.

Sir-lysosome stains lysosomes in ilve cells without the need for genetic manipulation or overexpression. Its emission in the far red minimizes phototoxicity and sample autofluorescence. SiR-lysosome is compatible with GFP and/or m-cherry fluorescent proteins. It can be imaged with standard Cy5 filtersets.

SiR-lysosome can be used for widefield, confocal, SIM or STED imaging in living cells and tissue. Probe quantity allows 50 – 200 staining experiments.*

*Based on the following conditions: 0.5 – 1 ml staining solution / staining experiments with 0.5 – 1 uM probe concentration. The number of staining experiments can be further increased by reducing volume or probe concentration.