. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. g> a Extracellular Ca** concentration. M Figure 6. Mean (±SEM, n > 7) maximum pigment aggregation velocities (R2 = ) and degree of maximum aggregation increase as a concentration-effect function (R2 = ) of increasing extracellular free [Ca"1"*] and are positively correlated (Pearson correlation. R = , P = ). Data from Macrobrachium olfersii red chromatosomes perfused with respective Ca**-10 mM EGTA buffer and 25 O) a Extracellular Ca** concentration. M Figure 7. Mean (±SEM, n a 7)
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. g> a Extracellular Ca** concentration. M Figure 6. Mean (±SEM, n > 7) maximum pigment aggregation velocities (R2 = ) and degree of maximum aggregation increase as a concentration-effect function (R2 = ) of increasing extracellular free [Ca"1"*] and are positively correlated (Pearson correlation. R = , P = ). Data from Macrobrachium olfersii red chromatosomes perfused with respective Ca**-10 mM EGTA buffer and 25 O) a Extracellular Ca** concentration. M Figure 7. Mean (±SEM, n a 7) maximum pigment dispersion veloci- ties (R2 = ) and degree of maximum dispersion (R2 = ) increase as a concentration-effect function of decreasing extracellular [Ca**] and are positively correlated (Pearson correlation, R = P = ). Data from Macrobrachium olfersii red chromatosomes perfused with respective Ca**-10 mM EGTA buffer after Ca** loading with 25 iiM A23187 and nWCa** for 30 mm. Literature Cited Abrao, M. S., A. M. Castrucci, M. E. Hadley, and V. J. Hruby. 1991. Protein-kinase C mediates MCH signal transduction in teleost. S\n- branchus marmoratus, melanocytes. Pigm. Cell Res. 4: 66-70. Booker, T. K., K. W. Smith, C. Dodrill, and A. C. Collins. 1998. Calcium modulation of activation and desensitization of nicotinic re- ceptors from mouse brain. J. Neurochem. 71: 1490—1500. Britto, A. L., A. M. Castrucci, M. A. Visconti, and L. Josefsson. 1990. Quantitative in vitro assay for crustacean chromatophorotropins and other pigment cell agonists. Pigm. Cell Res. 3: 28-32. Britto, A. L., L. Josefsson, E. Scemes, M. A. Visconti, and A. M. Castrucci. 1996. Ionic requirements for PCH-induced pigment ag- gregation in the freshwater shrimp, Macrobrachium potiuna, erythro- phores. Camp. Biochem. Physiol. 113A: 351-359. Carafoli, E. 1991. Calcium pump of the plasma membrane. Physiol. Rev. 71: 129-153. Fabiato, A. 1988. Computer programs for calculating total
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