Biology News
TCR signal strength controls the differentiation of CD4 - Science


Science
T cell differentiation into effector and memory T cell subsets is influenced by T cell receptor (TCR) signals. Snook et al. examine how TCR signals influence CD4+ T cell differentiation using a panel of cloned TCRs that recognize the same MHC II ...

Cell Studio: Serious games for immunology - Phys.Org


Phys.Org
The novel platform, known as Cell Studio, can simulate an organic microenvironment with biological and biophysical rules at the cellular level. Several biological scenarios can be simulated, including a 2-D or 3-D spatial patch of tissue or cell ...

Defining Interacting Regulatory Genes That Define Cell Subtypes - Technology Networks


Technology Networks
“The method has great potential for regenerative medicine when it comes to replacing cell subpopulations that have been lost in the course of disease, for example,” explains Prof. Dr Antonio del Sol, head of the Computational Biology group of the ...

Cell Cycle Info

Montreal, Quebec - Canada

The cell cycle refers to the events that take place in a cell between its inception and subsequent replication. The cell cycle is composed of 4 distinct phases: G1 phase, S phase, G2 phase, and M phase. Interphase is a collective term that describes the G1, S, and G2 phases. During interphase, the cell is growing and preparing for mitosis (M phase) by accumulating nutrients and replicating DNA. The M phase is composed of 2 coupled processes called mitosis and cytokinesis. In mitosis, the cell's chromosomes are partitioned between the 2 daughter cells. In cytokinesis, the cytoplasm physically divides, forming the 2 daughter cells.

Before we look at each stage in the cell cycle in detail, let's examine some additional terminology. Cells that have temporarily stopped dividing are said to have entered a quiescent state called G0 phase. Cells that have permanently stopped dividing are said to be senescent. Molecular events in the cell cycle must progress in a sequential and ordered manner. The molecular events of the cell cycle are controlled by 2 key regulatory molecules: cyclins and cyclin-dependent kinases. Rest of the information may be obtained from the website.

Related
The Stages of the Cell Cycle
United States

The stages of cell division (G1, S, G2. mitosis) are described and illustrated with an animation of the cell cycle: - G1 and G2 stand for 'gaps'. This refers to the fact that nothing very obvious is occurring in the nucleus of the cells during these stages. The cells are actually very active. They are growing and preparing to divide. - S stands for synthesis. This is the phase of the cell cycle in which the DNA is copied or replicated. - M s

Cell Cycle and Mitosis Tutorial
United States

Includes images and a QuickTime animation of the process.

Cell Cycle - Tocris Bioscience
United Kingdom

The cell cycle is the regulatory network that controls the order and timing of cellular proliferation events. It is divided into four stages, G1-S-G2-M. The G1 and G2 stages stands for 'GAP 1' and 'GAP 2' respectively. The S stage stands for 'Synthesis' and is the stage when DNA replication occurs. The M stage stands for 'mitosis', and is when nuclear and cytoplasmic division occurs, halving the genome.

Yeast Cell Cycle Analysis Project
United States

Resource for information on yeast genes regulated over the cell division cycle, from Stanford University, California.

Landes Bioscience Journals: Cell Cycle
United States

Cell Cycle covers all topics from man to virus, from DNA to RNA, from aging to development, from cell senescence to stem cells, from apoptosis to autophagy, from cancer to neurobiology, from molecular and theoretical biology to medicine and therapy. Cell Cycle utilizes an online submission and tracking system designed to provide efficient service to authors. Through the online system, author files are automatically converted to PDFs, submissions

Ant Colony Cycle
United States

View photos and read explanations of the life and building cycle of an ant colony. Click on the images for additional details.

Germany

Photographic study following the process from mating to the emergence of the butterfly from the pupa.

The Morel Life Cycle
United States

An article by Tom Volk on this delicious fungus and attempts to cultivate it.

Life Cycle of Takakia
Japan

Diagram illustrating the details of the life cycle of T. ceratophylla.

Citric Acid Cycle
United States

Diagram of steps in Krebs' tricarboxylic acid cycle, with 3D presentation dependent on Chime plug-in, from student at University of North Texas.