. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 2H CaCOj H Channel CALCIFYING NON-CALCIFYING • Ca" H*Channel Ca ATPase. 2 OH Figure 1. Models of extracellular calcification and its coupling to bicarbonate utilization in Chora. Left: schematic of a cell, showing alkaline band at top (with trapezoidal CaCO3 incrustations), and acid band below (with plasmalemmasomes, participating in bicarbonate use). "P" represents photosynthesis, (a) Proton channel model. HCO3~ diffuses to the alkaline surface and donates a proton, becoming converted to CO3", which prec
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 2H CaCOj H Channel CALCIFYING NON-CALCIFYING • Ca" H*Channel Ca ATPase. 2 OH Figure 1. Models of extracellular calcification and its coupling to bicarbonate utilization in Chora. Left: schematic of a cell, showing alkaline band at top (with trapezoidal CaCO3 incrustations), and acid band below (with plasmalemmasomes, participating in bicarbonate use). "P" represents photosynthesis, (a) Proton channel model. HCO3~ diffuses to the alkaline surface and donates a proton, becoming converted to CO3", which precipitates with Ca2+. (b) Ca2+ ATPase model. ATP driven 2H+/Ca2+ exchange alkalimzes the external medium and locally increases its Ca2+ concentration. CO2 diffuses from the cell and reacts with water to yield the protons needed for exchange with Ca;+, and the CO5" which precipitates as CaCOj. A 1:1 ration of calcification to photosynthesis is shown for both models. Right: elaborations on the H* channel and Ca2+ ATPase models for the alkaline band, incorporating inward accretion ofCaCO, incrustations, using CO2 as the carbon source. Proton channel (e, d) and Ca:+ ATPase models (e, I) showing the alkaline band under calcifying (c. e) and non-calcifying conditions (d. f). The ion fluxes detectable externally are Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
