Results 131 to 140 of about 869 (158)

Immunofluorescence evidence for cytoskeletal rearrangement accompanying pigment redistribution in goldfish xanthophores

Cell Motility, 1989
AbstractImmunofluorescence and phase‐contrast microscopic studies of goldfish xanthophores with aggregated or dispersed pigment show two unusual features. First, immunofluorescence studies with anti‐actin show punctate structures instead of filaments. These punctate structures are unique for the xanthophores and are absent from both goldfish dermal no ...
G R, Walker, J D, Taylor, T T, Tchen
openaire   +2 more sources

Light‐Induced Pigment Aggregation in Xanthophores of the Medaka, Oryzias latipes

Pigment Cell Research, 1998
The response mechanism of medaka xanthophores to light was examined at the cellular level. Innervated and denervated xanthophores of adult medakas responded to light (9,000 lux) within 30 sec by pigment aggregation, and this aggregation was not mediated through α‐adrenoceptors on the cell membrane. Maximum sensitivity to light was at wavelengths of 410–
N, Oshima, E, Nakata, M, Ohta, S, Kamagata   +3 more
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[5] Translocation of carotenoid droplets in goldfish xanthophores

1993
Publisher Summary This chapter describes the isolation and maintenance of xanthophores, the preparation of a permeabilized system capable of carotenoid droplet dispersion, and the identification of carotenoid droplet protein p57/pp57 and a cytosolic protein anterogin as important determinants for carotenoid droplet dispersion. Two radically different
T.T. Tchen, John D. Taylor
openaire   +1 more source

Morphological studies on the mechanisms of pigmentary organelle transport in fish xanthophores and melanophores

Microscopy Research and Technique, 2002
AbstractPigmentary organelle translocations within fish chromatophores undergo physiological color changes when exposed to external signals. Chromatophores can be isolated in high yields, and their pigmentary organelles can be tracked readily by microscopy.
Victoria A, Kimler, John D, Taylor
openaire   +2 more sources

Different distribution of melanophores and xanthophores in early tailbud and larval stages inTriturus alpestris

Wilhelm Roux's Archives of Developmental Biology, 1982
The subepidermal distribution of xanthophores and melanophores is investigated in embryos ofTriturus alpestris with a uniform (stage 28+) and a banded melanophore pattern (stage 35/36). In ultrathin head and trunk sections from stage 35/36 embryos which externally show longitudinal dorsal and lateral melanophore bands in the trunk and less compact ...
exaly   +3 more sources

Xanthophores in chromatophore groups of the premigratory neural crest initiate the pigment pattern of the axolotl larva

Wilhelm Roux's Archives of Developmental Biology, 1984
The barred pigment pattern (Lehman 1957) of the axolotl larva is best observed from stage 41 onwards, where it already consists of alternating transverse bands of melanophores and xanthophores along the dorsal side of the trunk. The present study investigateswhen the two populations of neural crest derived chromatophores, melanophores and xanthophores ...
Jan Löfberg
exaly   +3 more sources

The Non-Identity of the Neurohumors for the Melanophores and the Xanthophores of Fundulus

The American Naturalist, 1936
IT has been shown that the reactions of the xanthophores (yellow pigment cells) in Fundulus heteroclitus are independent of the responses of the melanophoresblack pigment cells (Connolly, 1925; Fries, 1931). For example, both the xanthophores and the melanlophores are contracted in a fish which has been kept for some time in an illuminated white vessel,
openaire   +1 more source

Pigment dispersion by prolactin in cultured xanthophores and erythrophores of some fish species

The Journal of Experimental Zoology, 1996
The direct effects of a pair of tilapia prolactins (tPRL177 and tPRL188) and of ovine prolactin (oPRL) on cultured xanthophores and erythrophores isolated from some fish species were examined. Cultured xanthophores of the Nile tilapia, paradise goby, and medaka responded to tPRL177 and oPRL at concentrations of less than 100 nM by pigment dispersion ...
Noriko Oshima, Shawichi Iwamuro
exaly   +2 more sources

ACTH-induced internalization of plasma membrane in xanthophores of the goldfish, Carassiusauratus L

Biochemical and Biophysical Research Communications, 1979
Abstract The ACTH-induced pigment dispersion in primary cultures and in suspensions of xanthophores of the goldfish, Carassius auratus L., has been shown to include the formation of rosette-like membranous structures and plasma membrane invaginations (pits).
S J, Lo, T T, Tchen, J D, Taylor
openaire   +2 more sources

Analysis of Xanthophore and Pterinosome Biogenesis in Zebrafish Using Methylene Blue and Pteridine Autofluorescence

Pigment Cell Research, 2002
We have identified two simple methods to analyse xanthophore and pterinosome biogenesis in zebrafish. The first uses methylene blue (methylthionium chloride), a redox dye which specifically labels xanthophores and pterinosomes, while the second uses autofluorescence to detect pteridine levels; these methods may be used to detect the number, location ...
Sylvie, Le Guyader, Suresh, Jesuthasan
openaire   +2 more sources