Quantitative Formation of Monomeric G-Quadruplex DNA from Multimeric Structures of c-Myc Promoter Sequence.

G-Quadruplex (G4)-forming DNA sequences have a tendency to form stable multimeric structures. This can be problematic for studies with synthetic oligodeoxynucleotides. Herein, we describe a method that quantitatively converts multimeric intermolecular structures of the Pu27 sequence from the c-myc promoter into the desired monomeric G4 by alkaline treatment and refolding.

Bone demineralization in rheumatoid arthritis.

In a group of 210 patients with various stages of rheumatoid arthritis divided according to mobility in 3 groups the highest clavicular cortico-diaphyseal indices were found in the group of exercising patients and the lowest results were in the immobilized group. Double measurements repeated after two years allowed us to establish the annlay loss of cortical bone in each group: -2.19% in the exercising group, -6% in the non-exercising group and -8.