## Abstract Granules were isolated from the cytoplasm of the amebocytes of __Limulus polyphemus__, the horseshoe crab, by disruption of cells obtained from blood which had been drawn into 2 mM propranolol. The granules subsequently were purified by centrifugation through a sucrose gradient that con
Fatty acids of the female horseshoe crabXiphosura (Limulus) polyphemus
β Scribed by D. J. Horst; R. C. H. M. Oudejans; A. G. Plug; I. Sluis
- Publisher
- Springer-Verlag
- Year
- 1973
- Tongue
- English
- Weight
- 533 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0025-3162
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β¦ Synopsis
The fatty acid composition of 9 different tissues and organs of the female horseshoe crab Xiphosura (Limulus) polyphemus -one of the very few recent representatives of the ancient arthropod class Merostomata --was investigated in reference to the distribution of fatty acids through the marine food web. Fatty acid spectra, in which polyunsaturated fatty acids are predominant, especially eicosapentaenoic acid (20:5 co3), revealed features characteristic of marine lipids. However, rather large quantities of monoenoic fatty acids also occur in all organs. In the saturated fatty acid fractions, the high content of branched-chain components is worth noticing, particularly in the gills and the carapace (35%); in all probability, the high amount of the branched-chain fatty acids is associated with their protective function in surface lipids. Isoprenoid fatty acids such as pristanie and phytanic acid were absent.
π SIMILAR VOLUMES
## Abstract Embryos of the primitive arthropod, __Limulus polyphemus__ L., exhibit a 5β50βfold increase in amino acid incorporation approximately 6β8 hours after fertilization, which is not concomitant with cytoplasmic alkalization. Lowering of intracellular pH before this increase occurs will prev
Mean water movements across the double chitin membrane of the Limulus gill are 5,000-7,000 pmoles/cm2.h. The carapace is much less permeable to water than the gill; this difference is probably due primarily to the greater thickness of the carapace. Variations in serum sodium concentration due to sal