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*CIL – Cell Image Library accession number. Please use this to reference an image.

CIL:12813*  Cite 

Pre-wave pulse (PWP). The apparently whole-embryo calcium pulse appears to initiate (the PWP region on the wave graphs) over a widespread area of blastoderm, possibly earliest at the animal pole, and then spreads first to the yolk cell membrane and then along the ventral midline heading rostrally. Fertilized zebrafish eggs were collected within 5 min of spawning, enzymatically dechorionated, and injected with approximately 0.9 nl of a 1% solution of recombinant f-aequorin in 100 mM KCl, 5 mM Mops, and 50 μM EDTA. During imaging the embryos were maintained at 28°C in 30% Danieau's medium containing penicillin (0.5 mg/ml), streptomycin (5,000 units/ml; Sigma), and 0.5% methylcellulose. Imaging was performed on a Photon Imaging Microscope (Science Wares, Falmouth, MA) that used a photon-counting spatial detector with a resistive anode output (Photek, St. Albens-on-Sea, U.K.). Digitized detector output in the form of a stream of time-labeled eight-bit x--y coordinates (256 × 256 pixels) was used to construct time-lapse imaging sequences. The imaging system software allowed the original photon data stream to be analyzed according to any chosen integration time, with the resulting image frames maintaining accurate photon quantitation up to 256 photons per pixel. These images are part of an image series within the Zebrafish--The Living Laboratory CD made available by Mark Cooper and described in Methods in Cell Biology Volume 77, 2004, Pages 439-457. Corresponds to prewave pulse supplemental video in PNAS January 5, 1999 vol. 96: 157-161. See Fig 1 in this paper for quantification of color scale.

Biological Sources
NCBI Organism Classification
Danio rerio
Cell Line
Biological Context
Biological Process
detection of calcium ion
Zebrafish Anatomy
animal pole
ventral midline
Andy Miller
Sarah Webb
PNAS January 5, 1999 vol. 96: 157-161
Hong Kong University of Science and Technology, Hong Kong, China
Zebrafish -- The Living Laboratory
Methods in Cell Biology Volume 77, 2004, Pages 439-457
Digital Object Identifier (DOI)
Archival Resource Key (ARK)
Grouping This image is part of a group.
Image Type
recorded image
Image Mode
fluorescence microscopy
Parameters Imaged
Source of Contrast
distribution of a specific protein
Visualization Methods
Processing History
color coded photon counts
Data Qualifiers
processed data
Sample Preparation
living tissue
Relation To Intact Cell
whole mounted tissue
Spatial Axis Image Size Pixel Size
X —— 2.5µm
Y —— 2.5µm
Time 30 seconds