Molecular Station

Micrograph Cell Nucleus

admin — Fri, 14 Dec 2007 04:15:18 -0600

by: admin

Description: Micrograph of a cell nucleus published in Inside the Cell, a publication of the US National Institute of General Medical Sciences/National Institutes of Health.

Mitosis Fluorescent Chromosomes

admin — Fri, 14 Dec 2007 04:13:57 -0600

by: admin

Description: An image of a newt lung cell stained with flourescent dyes undergoing mitosis, specifically during early anaphase. According to NIH, "The scientists use newt lung cells in their studies because these cells are large, easy to see into, and are biochemically similar to human lung cells." The material stained green are the mitotic spindles, the material stained red is the cell membrane and some components of the cytoplasm near it, and the material stained light blue are the chromosomes.

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HeLa Cell Nuclei Staining

admin — Fri, 14 Dec 2007 04:10:25 -0600

by: admin

Description: HeLa cells stained with Hoechst 33258 stain. HeLa cells stained for DNA with the Blue Hoechst dye. The central and rightmost cell are in interphase, thus their entire nuclei are labeled. On the left a cell is going through mitosis and its nucleus has disintegrated in preparation of division.

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Human Blastocyst

kiki06 — Tue, 05 Dec 2006 17:00:49 -0600

by: kiki06

Description: Human Blastocyst. Depicting ICM inner cell mass, and ZP the zona pellucida. The blastocyst stage of development in the embryos of humans is around 5 days old with 30-150 cells.

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Cell Size

kiki06 — Tue, 05 Dec 2006 16:57:47 -0600

by: kiki06

Description: Microscopy of cells with size scale. P19 mouse embryonal carcinoma cells were fixed with methanol and stained using an antibody that specifically binds the protein α-catenin. The α-catenin protein is concentrated at the cell surface where it functions to anchor cell surface cadherin cell adhesion proteins to the intracellular cytoskeleton. The locations of α-catenin proteins were visualized by scanning laser confocal microscopy. These are average size animal cells. The copyright to this image is retained by John Schmidt (JWSchmidt). Permission is granted to copy, distribute and/or modify this image under the terms of the GFDL.

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Hooke Cell Cork

kiki06 — Tue, 05 Dec 2006 16:56:06 -0600

by: kiki06

Description: Schem. 11 of Robert Hooke's 1664 Micrographia showing a drawing of the cell like structure of cork, from which the name originally derives.

Blood Cells - Scanning Electron Microscope

kiki06 — Tue, 05 Dec 2006 16:54:17 -0600

by: kiki06

Description: This is a scanning electron microscope image from normal circulating human blood. One can see red blood cells, several white blood cells including lymphocytes, a monocyte, a neutrophil, and many small disc-shaped platelets. Red cells are nonnucleated, and contain hemoglobin, containing iron an important protein which allows the cell to carry oxygen to other parts of the body. They also carry away carbon dioxide from the lungs. The infection-fighting white blood cells, are classified in 2 main groups: granular and agranular. Granulocytes are formed in bone marrow, agranulocytes are produced by lymph nodes and spleen. There are two types of agranulocytes: lymphocytes, fight disease by producing antibodies and thus destroying foreign material, and monocytes. Platelets are tiny cells formed in bone marrow and are necessary for blood clotting. Bruce Wetzel (photographer). Harry Schaefer (photographer)

Human Male Karyotype

molecule2005 — Wed, 01 Nov 2006 12:06:14 -0600

by: molecule2005

Description: Human Male Karyotype. Chromosomes NHGRI Karyotype of a human male. Source: http://www.genome.gov/Pages/Hyperion//DIR/VIP/Glossary/Illustration/karyotype.shtml

1 comment

Protein GFP Localization

kiki06 — Sun, 22 Oct 2006 17:00:05 -0500

by: kiki06

Description: Examples of subcellular localizations using GFP tagged proteins. Jeremy Simpson and Rainer Pepperkok With friendly permission of Jeremy Simpson and Rainer Pepperkok

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Cell Membrane Figure - Plasma Membrane

kiki06 — Sun, 22 Oct 2006 16:54:53 -0500

by: kiki06

Description: Cell Membrane Figure - Plasma Membrane Schematic three dimensional cross section of a cell membrane. There are two major components of this dynamic, fluid, structure: lipids and proteins. A lipid bilayer provides the basic structure within which proteins are free to diffuse. Sugar moieties can be present as part of either proteins (glycoproteins) or lipids (glycolipids). A further important component shown is cholesterol; which intercalates between lipid molecules and affects membrane fluidity/stability. Essential Biological Functions: Immune response Cell metabolism Neurotransmission Photosynthesis Cell adherence Cell growth and differentiation Potential Commercial Applications Drug response monitoring Chemical manufacturing Biosensing Energy conversion Tissue engineering Source: NIST: These World Wide Web pages are provided as a public service by the National Institute of Standards and Technology (NIST). With the exception of material marked as copyrighted, information presented on these pages is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credits is requested. The drawing was made by Dana Burns, and can also be found in Scientific American, 1985, 253(4), pages 86-90, in the article The molecules of the cell membrane by M.S. Bretscher.

3 comments

Nucleus Endoplasmic Reticulum ER Golgi

kiki06 — Sun, 22 Oct 2006 16:52:01 -0500

by: kiki06

Description: Nucleus Endoplasmic Reticulum ER Golgi Figure 1 : Image of nucleus, endoplasmic reticulum and Golgi apparatus. 1 Nucleus 2 Nuclear pore 3 Rough endoplasmic reticulum (rER) 4 Smooth endoplasmic reticulum (sER) 5 Ribosome on the rough ER 6 Proteins that are transported 7 Transport vesicle 8 Golgi apparatus 9 Cis face of the Golgi apparatus 10 Trans face of the Golgi apparatus 11 Cisternae of the Golgi apparatus

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Diagram of the endomembrane system on a Eukaryote cell.

admin — Sun, 15 Oct 2006 05:21:37 -0500

by: admin

Description: Diagram of the endomembrane system on a Eukaryote cell. Mariana Ruiz

4 comments

Stem Cells Diagram.

admin — Sun, 15 Oct 2006 04:52:57 -0500

by: admin

Description: The source of pluripotent stems cells from developing embryos Original work by Mike Jones. This image is licensed under the Creative Commons Attribution ShareAlike License v. 2.5.

3 comments