Biotin-protein ligase (EC 6.3.4.15) activates biotin to form biotinyl 5' adenylate and transfers the biotin to biotin-accepting proteins. It also functions as a biotin operon repressor.
Firefly luciferase catalyses the oxidation of luciferin to oxyluciferin in an ATP-dependent process generating chemiluminescence at 560 nm (pH 7.8)
T4 replication helicase (gp41) and polymerase (gp43) can be assembled onto a loading site located near the end of a long double-stranded DNA template in the presence of a macro-molecular crowding agent, and that this coupled “two-protein” system can carry out ATP-dependent strand displacement DNA synthesis at physiological rates (400 to 500 bp per sec) and with high processivity in the absence of other T4 DNA replication proteins.
Bacteriophage T4 Lysozyme breaks down bacterial cell walls. The enzyme attacks the peptidoglycans in the cell walls of bacteria and hydrolyzes the β-1,4 linkages between N-acetylmuramic acid and N-acetylglucosamine. Specific activity of T4 lysozyme is significantly greater than egg white lysozyme when assayed with Micrococcus lysodeikticus and E. coli.
