Download Connective Tissue: Macromolecular Structure and Evolution by Professor Martin B. Mathews Ph. D. (auth.) PDF

By Professor Martin B. Mathews Ph. D. (auth.)

This e-book offers essentially with the central extracellular macromole­ cules of animal connective tissues. It makes an attempt to respond to a few basic questions about the organic association of the tissues: what's the nature of this association at numerous dimensional degrees? What services does the association serve? How has it advanced? i've got given significant emphasis to the constructions and homes of the macromolecular elements of extracellular matrices from quite a lot of invertebrates and vertebrates. In doing so, notwithstanding, i've got taken care of cursorily many vital facets of connective tissue biology that seemed to be in basic terms not directly correct to the significant questions requested. however, i have never hesitated to go looking for huge organic rules outdoor the existing conceptual barriers of animal connective tissues and the reduce molecular dimensional degrees. the varied speculations awarded will, i am hoping, stimulate the reader to additional suggestion and research. Acknowledgements My formerly unpublished facts which were integrated during this quantity couldn't were got with out the beneficiant presents of specimens and different guidance via a few members and associations. those are Dr. G. BERENSON of Louisiana country college, Drs. W. P. BRAKER and D. ZUMWALD of the Shedd Aquarium, Dr. S. H. CHUANG of the Univer­ sity of Singapore, Dr. L. G. CLARK and Mr. U. M. VARELA-DIAZ of the collage of Pennsylvania, the govt of Nicaragua, Dr. E. CLARK of Cape Haze Marine Laboratories, Mr. C. E.

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Extra resources for Connective Tissue: Macromolecular Structure and Evolution

Sample text

Considerable doubt also attaches to carbohydrate contents, particularly to sugar residues such as hexosamines, mannose, arabinose, fucose, and others not found in purified preparations from vertebrates. The Protista contain collagen-like proteins but are considered elsewhere (Chap. 9, Sect. 1). Phylogenetic relationships among the major invertebrate groups are shown in Fig. 2. a) Porifera Two types of collagen have been identified in the body of sponges (see GROSS, 1963). Spongin A is present as a mesh of very fine fibrils while spongin B consists of large, branched fibers.

A) Cyclostomata The hagfish Myxine gZutinosa L. and the lamprey Petromyzon fiuviatiZis L. are representative of the two orders of cyclostomes. 3) were reported by PIKKARAINEN (1968) to contain only a single type of a chain. 5). 3). PIKKARAINEN (1968), however, was unable to detect more than one a component in skin collagen of the smooth dogfish MusteZus musteZus L. by gel electrophoresis. This discordance may be due to some unsuspected biological variation, or simply to insufficient resolving power of the method (note also that this collagen differs from spiny dogfish collagen in composition and in T d ) .

The solubilized collagen appears to be highly cross-linked. A Td of 31 0 (uncorrected) is consistent with a total pyrrolidine content of 191 residues per 1000. 1% of mannose, corresponding to a presumed glycosylation of about 5 residues of hydroxy lysine per 1000 (see also Chap. 7, Sect. 3). 9. Chordata Craniata (Vertebrate) Collagen The vertebrates have been classified into eight classes, one of which, the Placodermi, has become extinct. They have also been divided in a less formal fashion into Pisces ("fish"), including all primitive aquatic groups, and Tetrapoda ("four-footed"), the terrestrial classes: { { Class Agnatha Pisces Class Placodermi Class Chondrichthyes (Elasmobranchii) Class Osteichthyes Class Amphibia Tetrapoda Class Reptilia Class Aves Class Mammalia The general relationships between the major vertebrate taxonomic groups are outlined in Fig.

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