Glossary – L

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Leukocytes are more commonly known as white blood cells, and play a crucial role in the immune system. Leukocytes can be grouped into lymphocytes, granulocytes, monocytes, macrophages and dendritic cells.

Liposomes are mono- or multilamellar vesicular particles consisting of lipid bilayers that can transport DNA, RNA or drugs into cells.

A method for differentiating between living and dead cells. The membrane of a living cells acts as a potent barrier to many substances. This barrier is disrupted in dead cells. Therefore, dyes diffuse into dead cells which become colored, whereas living cells remain colorless.

Luciferases are enzymes that catalyze the oxidation of their substrate luciferin resulting in the emission of light (bioluminescence). The equation of the chemical reaction is “luciferin + O2 → oxyluciferin + light”. The emitted light can be detected and used for imaging (bioluminescence imaging).

Lymphocytes are a subtype of leukocytes (white blood cells) that are crucial in the immune system. Lymphocytes include T cells, B cells and natural killer cells (NK cells).