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Polymerization of actin monomers into filaments requires the initial formation of nuclei composed of a few actin subunits; however, their instability has hindered their detailed study. Therefore we used chemically crosslinked actin oligomers to analyse their effect on actin polymerization. Actin dimer (upper dimer, UD), trimer and tetramer intermolecularly crosslinked by phenylene‐bismaleimide along...
The β-thymosins are intracellular monomeric (G-)actin sequestering proteins forming 1:1 complexes with G-actin. Here, we analysed the interaction of thymosin β4 with F-actin. Thymosin β4 at 200 μM was chemically cross-linked to F-actin. In the presence of phalloidin, the chemically cross-linked actin:thymosin β4 complex was incorporated into F-actin. These mixed filaments were of normal appearance...
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