Conformational Basis Research Articles

The conformational basis of energy conservation in membrane systems. II. Correlation between conformational change and functional states.

In a previous communication by Penniston et al.l in these PROCEEDINGS, the multiple configurational states of the inner membrane of the mitochondrion were shown to be determined both by the conformation of the repeating units (nonenergized, energized, or energized-twisted) and also by the mode of the cristae (orthodox, aggregated, or comminuted). The conformational changes in the repeating units were constant and independent of the mode of the cristae, but the electron microscopic expression of these conformational changes at the membrane level was profoundly affected by the mode of the cristae. Table 1 summarizes

The conformational basis of energy transformations in membrane systems. I. Conformational changes in mitochondria.

The conformational basis of energy transformations in membrane systems. I. Conformational changes in mitochondria.

Conformational Aspects of Many‐Membered Rings

AbstractThe stereochemistry of the various chemical grouping which constitute the structural units of ring systems is first reviewed. It is then shown that the strain‐free possibilities even of large rings are restricted, and that the ring conformation theoretically derived generally correspond to those found by physical methods. Variations of physical properties and of cyclization yield in homologous series are explained on a conformational basis.

Macrocyclic compounds. Part XII. cis–trans Equilibria in non-conjugated cycloalkadienes

The thermodynamic equilibria between the trans,trans-, cis,trans-, and cis,cis-isomers of symmetrical cycloalkadienes (C10–C24) were determined at 25 and 75° by irradiation in the presence of diphenyl sulphide or disulphide. The preferences for certain isomers are explained on a conformational basis. Using acetophenone as a photosensitiser, the photostationary states were also established; they often approximate to the thermodynamic equilibria.

The genetical basis of conformation in cattle as revealed by crossbreeding

Zeitschrift für Tierzüchtung und ZüchtungsbiologieVolume 75, Issue 1-4 p. 262-275 The genetical basis of conformation in cattle as revealed by crossbreeding A. G. Dickinson, A. G. Dickinson A. R. C. Animal Breeding Research Organisation, EdinburghSearch for more papers by this author A. G. Dickinson, A. G. Dickinson A. R. C. Animal Breeding Research Organisation, EdinburghSearch for more papers by this author First published: January‐December 1961 https://doi.org/10.1111/j.1439-0388.1961.tb01313.xCitations: 5AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Citing Literature Volume75, Issue1-4January‐December 1961Pages 262-275 RelatedInformation

The Muscle-Bone Ratio as an Index of Merit in Beef and Dual-Purpose Cattle

A study was made of the muscle-bone ratio in 135 steers, 55 of which were beef Shorthorn and 80 dual-purpose Shorthorn. Statistically significant differences were observed between the types which accounted for approximately 15.6 per cent of the total variance. There was a significant difference between sires within each type which accounted for approximately 22 per cent of the total variance. Tests for differences between sire groups within each type showed several highly significant differences. No significant correlation was found within types between muscle-bone ratio and per cent of separable fat in the carcass. No relationship was found between live animal measurements and the muscle-bone ratio, indicating that selections could not be made on the basis of conformation as evaluated by such measurements. There were significant correlations between some of the carcass measurements and the muscle-bone ratio, but none were high enough to be of value in predicting muscle-bone ratio within types. The highest relationships were with leg bones as a percentage of live weight and the average thickness of the meat over the rib. There was no relationship between muscle-bone ratio and efficiency of gain or age of steer at slaughter. Necessary differences were calculated between sire groups, and it was determined that beyond approximately 10 steer offspring, relatively little information was obtained for each additional steer studied.