This test reveals contamination by bacterial endotoxins (lipolysaccharide), which is a membrane component of gram-negative bacteria. This reaction is the basis of LAL test, used for detection and quantification of bacterial endotoxins. Limulus amebocyte lysate (LAL) is an aqueous extract of blood cells (amoebocytes) from the Atlantic horseshoe crab, Limulus polyphemus.
It was later recognized that the animal’s blood cells contain granules with a clotting factor known as coagulogen; this is released outside the cell when bacterial endotoxin is encountered. Resulting coagulation is thought to contain bacterial infections in the animal’s semi-closed circulatory system.
LAL reacts with bacterial endotoxin lipopolysaccharide (LPS).
Test for endotoxins is performed in compliance with Europe pharmacopeia test 2.6.14.
gb Easy PCR Master Mix gb Easy PCR Master Mix consists of hot-start Taq DNA polymerase, reaction buffer, dNTP and MgCl2. The Taq polymerase is chemically modified DNA polymerase from Thermus aquaticus. This polymerase is completely inactive at room temperature but it is rapidly activated during the initial denaturation step of PCR. The product falls into a group of TaqMan Real-Time PCR Master Mixes to provide probe-based qPCR.
Why choose alternative dyes instead of "genuine" dyes? First, they are cheaper, and second, they can give the same results. Another reason is that the number of suppliers who can provide modified oligonucleotides is restricted - only a patent or a licence owner is usually allowed to produce them.
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