Morphological variation

The molecular weight and morphological variations are in themselves interesting. Seeking a quantitative explanation for them, and for the observed MWD effects, is quite challenging however. We have noted, first of all, that in all cases, not just the nonisothermal samples, the MWD is broader than can be predicted by the model developed in a previous section. 

Tishler, P. V. Lamborot-Manzur, M. and Atkins, L. "Polymorphism of the Human Y Chromosome Fluorescence Microscopic Studies on the Sites of Morphological Variation". 

The morphological variation within the complex is reflected in the number of taxonomic descriptions (ca. 20) that have been published defining species, subspecies. 

Culberson, W. L. 1967. Analysis of chemical and morphological variation in the Ramalina siliquosa species complex. Biittonia 19 333-352. 

Noguchi, H. Yoshikawa, K., Morphological variation in a collapsed single homopolymer chain, J. Chem. Phys. 1998,109, 5070-5077... 

Fig. 62 Morphology variation of blends of two diblock copolymers as/s,- (i = 1, 2, 3) in parameter space of chain length ratio r and ip-ps- Upper line Morphologies of asymmetric (as) and three symmetric (si, S2 and S3) PS-fc-PI copolymers. From [186]. Copyright 2001 American Chemical Society...

It is common among fibril-forming proteins that a single protein can form fibrils of varied morphology. Variations may arise at the level of subunit conformation, which seems to be the case for the prion proteins, or at the level of protofilament packing, as described in the preceding for insulin. 

There are six main textural, mineralogical, and morphological variations of felsic intrusions underground at Cantung ... 

Laurin, B., David, B., De Ridder, C. (1988). Growth of Echinocardium cordatum test morphological variations. Proceedings of the 6 " International Symposium on Echinodermata, 19-22/9, pp 177-178. 

Figure 7.6. Morphological variation expected in twins of real crystals. The symbols indicate dislocations. Only similar forms or unidirectional growth are expected.

H. IwasakiandF. Iwasaki, Morphological variations of quartz crystals as deduced from computer experiments,/. Crystal Growth, 151,1995, 348-58... 

Benchimol M (2001) Hydrogenosome morphological variation induced by fibronectin and other drugs in Tritrichomonas foetus and Trichomonas vaginalis. Parasitol Res... 

Figure 8.6 Morphological variation of DNA. Transmission electron micrographs of T4 DNA are shown, except for the rod structure where A DNA is used. The scale bar is 100 nm. The giant toroid is formed under a high concentration of spermidine in the buffer solutions with rather high salt (Yoshikawa et al, 1999). The segregated structure is generated by PEG-A (polyethylene glycol with pendent amino groups Yoshikawa et al., 1997b). Further explanation on the experimental conditions is available in the text.

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