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Optical rotatory dispersion measurements were made on the deoxyribo nucleotides d(pA)2, d(pA)4, d(pA)6 and poly(deoxyriboadenylic acid) at neutral pH over the temperature range 5–80°C. and were compared to similar data for the analogous oligoriboadenylic acids. The data were interpreted in...
Using 14C‐labeled KSCN and 36Cl‐labeled KC1, we have determined the selective removal of ions and water by fibrous, crosslinked collagen both below and above the denaturation temperatures at several molarities under or near isoelectric conditions. The results for KSCN show there is an...
According to the proposed mechanism for the enzymatic formation of dextran, branches of different length are formed in a reaction between a so‐called acceptor dextran molecule and an active reaction complex; propagation of the dextran chain occurs by an insertion‐type polymer growth. To...
The amylose–dimethyl sulfoxide complex has been investigated with the aid of x‐ray diagrams of oriented fibers. The amylose occurs in a six‐residue helix with alternate “up” and “down” chains packed in a square array, that is, pseudo‐tetragonal. A unit cell is proposed with a = b...
The volume change which occurs in dilute tropocollagen solution as a result of the phase transition producing the “native” form of collagen aggregate has been measured dilatometrically. A volume increase of 0.8 × 10−3 ml./g. collagen in phosphate buffer (pH 7–7.5) was determined. The...
The rotatory dispersion of the β‐form of polypeptides is considered. The parameter b0 of the Moffit‐Yang equation is calculated quantum mechanically. The results obtained b0 = −30, agrees with experiment which gives b0 near zero for the β‐form.
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