Occurrence structure

An article entitled Memo globin Its Occurrence Structure and Adaptation appeared in the March 1982 issue of the Journal of Chem ical Education ipp 173-178)... 

Sarkanen, K. Ludwig, C. Lignins. Occurrence, Structure, and Reactions Wiley-Interscience New York, 1971. 

Many excellent discussions of natural occurrence, structure, characterization, and analysis of phenolic compounds are available in the literature, and a series of books devoted to flavonoid chemistry has also been published. Detailed discussions on various chromatographic modes, including HPLC, GC, column chromatography (CC), capillary electrophoresis (CE), PC, and TLC, of simple phenolics and polyphenols are also presented in the recent book, Handbook of Food Analysis, volume 1, edited by Nollet (1). Due to their diversity and the chemical complexity of phenolic compounds, this chapter is limited to phenolic compounds that are considered to be important to foods and the food industry. 

Hunt, "Hemoglobin Its Occurrence, Structure, and Adaptation," /. Chem. Educ., Vol. 59,1982, 173-178. 

Crozier, A., Clifford, M. N., and Ashihara, H. (2006). Plant Secondary Metabolites Occurrence, Structure and Role in the Human Diet. Blackwell Publishing Ltd., Oxford, UK. 

A review119 is available covering the occurrence, structure, and biosynthesis of this... 

Spermidines substituted with cinnamic acid derivatives seem to be widely distributed in the plant kingdom. Cinnamic acid (alkaloid maytenine), caffeic acid (caffeoylspermidine, dicaffeoylspermidine), 4-coumaric acid (coumaroylspermidine, dicoumaroylspermidine, tricoumaroylspermidine), ferulic acid (feruloylspermidine, diferuloylspermidine), and sinapic acid (sinapoylspermidine, disinapoylspermidine) are known as aromatic amide substituents of spermidine. Occurrence, structure elucidation, and syntheses are summarized in Section V. 

Of the more than 4500 known naturally occurring organohalogen compounds, a large fraction are alkaloids [1,3]. Most of these halogenated pyrroles, indoles, carbazoles, carbolines, tyrosines, and others have a marine origin. The present chapter surveys the occurrence, structure, and biosynthesis of these fascinating natural products. However, given their sheer number, this review focuses mainly on recent examples. 

MP Cava, KT Buck, and KL Stuart in The Alkaloids. Vol. 16. pp. 249, The Bisbenzylisoquinoline Alkaloids — Occurrence, Structure and Pharmacology, RHF Manske, Ed., Academic Press, New York (1977). 

Secophenanthroindolizidine alkaloids and their secophenanthroquinolizidine analogs were last surveyed in Volume 28 of this series (i). A comprehensive review on the occurrence, structural elucidation, biosynthesis, synthesis, and biological activity of the phenanthroindolizidine alkaloids, including their seco variants, was published in 1987 (57P). The topic was also included in several more general reviews on indolizidine alkaloid chemistry 14,19,563). 

M21. McCord, J. M Superoxide dismutase Occurrence, structure, function, and evolution. Isozymes Curr. Top. Biol. Med. Res. 3, 1-21 (1979). 

This chapter reviews the occurrence, structure, and reactivity of chlorophyll catabolites from vascular plants and from some microorganisms. In parallel, synthetic means for obtaining such tetrapyrrolic compounds are recapitulated. The available structural information on chlorophyll catabolites (7) has provided a basis for deriving much of the current insights into the biochemical pathways of chlorophyll breakdown in plants and for complementary plant-biological work, as has been reviewed elsewhere recently (see Scheme 1) (2, 3, 4, 5, 6). 

Few of the recently published reference books covering natural products provide the chemist, within a single volume, with most of the detail which is frequently required, viz. names, structure, physical data, together with references to occurrence, structure determination, and synthesis. The revised edition of Karrer, and its first supplement,do provide this detail in their comprehensive coverage of plant products. This strength makes these volumes indispensable, despite the delay in covering the literature, viz. to 1956, and 1957—61 respectively. Newly isolated monoterpenoids now occupy a class of their own in the first supplement, although some cycloheptane monoterpenoids e.g. /8-dolabrin), quinones e.g. /S-thujaplicinol), and tetrahydrocannabinol (the formula is incorrect) are listed separately. 

REDOX CATALYSTS—OCCURRENCE, STRUCTURE, AND PHYStOLOGICAL PROPERTIES... 

Table II summarizes the occurrence, structures, and physical data of alkaloids isolated from Dionchophyllaceae and includes the methods applied for their structural elucidation.

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