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- W3103597181 abstract "The functions of mineralized hard parts are often self-evident. In many of the tables throughout the book we note the assigned or very often assumed functions of many different mineralized bodies. Often, however, assumed functions do not stand up to closer examination. A good example is the study of the cells of the hepatopancreas of gastropods (Howard et al. 1981). These glands have numerous cells containing intracellular mineralized granules. It was generally assumed that they all functioned as transient storage sites for calcium ions, until it was found that a subpopulation forms granules of a different type, which are used for heavy metal detoxification. Granules can be used in other ways as well. Certain polychaete worms, for example, strengthen their muscles by packing them with granules (Gibbs and Bryan 1984). Spicules are also commonly formed by many organisms and their functions are often not understood. They tend to have elaborate morphologies and mineralogies that are species specific, implying that they do perform specialized functions. These are just a few of many examples in which the functions of mineralized bodies still need to be determined. In this chapter we describe four different cases in which the functions are fairly well established. They have been investigated in some detail and, thus, provide good guidelines as to the various approaches by which function can be investigated. Some gravity receptors have been closely examined with respect to neuroanatomy and function, but not with respect to the specific adaptations of structure and mineralogy of the ubiquitous “heavy bodies.” Studies of biologic magnetic field receptors, in contrast, have focused on the mineral, and virtually nothing is known about the neuroanatomy. The molecular structure of the iron storage molecule ferritin is known with a resolution of a few Angstroms. Ferritin provides us with a glimpse of the insights that can be gained into function from such detailed structural information. Finally, some studies on the control of proteins on ice crystal formation represent the first application of the powerful techniques of molecular biology to determining function in biomineralization. These are undoubtedly the forerunners of many function-oriented studies using molecular biological techniques." @default.
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- W3103597181 date "1989-07-27" @default.
- W3103597181 modified "2023-10-14" @default.
- W3103597181 title "Some Nonskeletal Functions in Biomineralization" @default.
- W3103597181 doi "https://doi.org/10.1093/oso/9780195049770.003.0012" @default.
- W3103597181 hasPublicationYear "1989" @default.
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