Photoinduced intramolecular electron-transfer reactions for reconstituted met-and zinc-myoglobins appending acridine and methylacridinium ion as DNA binders

Article Abstract:

The synthesis of three types of met- and zinc- myoglobin dyads, ZnMbAc(4)[Me.sup.+], ZnMbAc(6)[Me.sup.+], and metMbAc(6) is described by incorporating chemically modified metalloporphyrin cofactor appending an acridine(Ac) or a methylacridium ion ([[AcMe].sup.+]) into apo-Mb. It is shown that synthetic manipulation at the Mb surface with the use of an artificial DNA binder along with photoinduced reaction, can give insight to build new Mb-DNA complex and sensitive fluorescent for DNA.

DNA binding proteins, Myoglobin, Structure, Report

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Photophysical processes in the complexes of DNA with ethidium bromide and acridine orange: A femtosecond study

Article Abstract:

The ethidium bromide (EB) and acridine orange (AO) in the complexes with DNA in aqueous solutions are studied by using techniques like emission up-conversion, absorption pump-probe, flash photolysis, steady-state luminescence and circular dichroism (CD). This combination of methods allows one to detect oxidized form of ethidium and also points a delocalization of the electronic excitation over the neighboring dye separated by two base pairs in the DNA stack.

Analysis, Circular dichroism

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Morphology selected molecular architecture: Acridine carboxylic acid monolayers on Ag (111)

Article Abstract:

UHV-scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) are used to characterize the molecular architecture of acridine-9-carboxylic acid (ACA) grown on Ag (111). Chain phase and dimmer phase structure, the two distinct adlayer structures are reported for ACA, which behave as the two-dimensional equivalent of polymorphism.

Monomolecular films, Carboxylic acids, Atomic properties

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