B-acute lymphoblastic leukemia (B-ALL) is the frequent pediatric malignity. Chemotherapy is the most practical approaches to deal with such malignancies. Microtubule-targeted agents are one of the most strategic drugs which formerly use in chemotherapy.Although,colchicine-binding anti-tubulin agents exhibited promising effects in clinical trials, their exact mechanism of action is not fully und...

A new b-type cytochrome, cytochrome b561 (Murakami, H., Kita, K., Oya, H., and Anraku, Y. (1984) Mol. Gen. Genet. 196, 1-5) was purified to near homogeneity from the cytochrome b561-amplified Escherichia coli K12 strain HM204/pAM5029. The purified cytochrome b561 was a single polypeptide with a molecular weight of 18,000, determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. ...

An important role in ensuring the functioning of respiratory chain belongs to cytochrome part, which includes complexes III (ubiquinol-cytochrome c oxidoreductase) and IV (cytochrome oxidase). The key components these enzymatic are heme-containing cytochromes, number depends on balance heme synthesis catabolism. δ-Aminolevulinate synthase catalyzes first step biosynthetic pathway, while oxygena...

Circular dichroic spectra of the cytochrome b--c1 complex exhibit bilobe formation typical of exciton splitting in the presence of uncoupler. Bilobe formation occurs if both cytochrome c1 and cytochrome b are fully reduced. The fully oxidized and ascorbate-reduced complexes are not altered dichroically by uncouplers. The exciton splitting induced by uncoupler is consistent with heme--heme inter...

1. Cytochrome b(5) is released from rat liver microsomes by both proteolytic enzymes and by treatments that disrupt phospholipids. Cytochrome P-420 is only released to a marked extent by treatments that disrupt phospholipids. 2. Cytochrome b(5) was isolated in a pure state from both the rough and smooth fractions of rat liver microsomes after treatment with trypsin, and was shown to contain two...

Following laser activation of electron transport in the pale green mutant of Chlamydomonas reinhardii, the following kinetics are observed: 1) A rapid absorption decrease at 421 mmu (half-time < 2 x 10(-6) sec) recovering with a half-time of approximately 7 x 10(-3) sec. 2) Oxidation of cytochrome f at 554 mmu with a half-time of 1 x 10(-4) sec. 3) Oxidation of cytochrome of type b, at 432 and ...