terms pre-cell (precell), proto-cell (protocell), etc. are frequently used to designate hypothetical ancestral entities precursing complete cells. The...

involving B cell receptors (BCR) on the surface of the cell. Positive selection occurs through antigen-independent signalling involving both the pre-BCR and...

theories to explain the evolution of cells, for instance in the pre-cell theory, dealing with the evolution of the first cells on this planet, and in the syncytial...

cells, are the cells that primarily compose adipose tissue, specialized in storing energy as fat. Adipocytes are derived from mesenchymal stem cells which...

all cells come from pre-existing cells. Cells are the basic unit of structure in all living organisms and also the basic unit of reproduction. Cell theory...

cells, that cells are the fundamental unit of structure and function in all living organisms, and that all cells come from pre-existing cells. Cells are...

A prison cell (also known as a jail cell) is a small room in a prison or police station where a prisoner is held. Cells greatly vary by their furnishings...

to understand the process appears well within reach. A protocell is a pre-cell in abiogenesis, and was a contained system consisting of simple biologically...

risk of developing pre-eclampsia. In pre-eclampsia, abnormal expression of chromosome 19 microRNA cluster (C19MC) in placental cell lines reduces extravillus...

hypothesized common ancestral cell from which the three domains of life, the Bacteria, the Archaea, and the Eukarya originated. The cell had a lipid bilayer; it...

of pre-cells, i.e. evolving entities of primordial life with different characteristics and widespread horizontal gene transfer. From this pre-cell population...

A cytotoxic T cell (also known as TC, cytotoxic T lymphocyte, CTL, T-killer cell, cytolytic T cell, CD8+ T-cell or killer T cell) is a T lymphocyte (a...

Embryonic stem cells (ESCs) are pluripotent stem cells derived from the inner cell mass of a blastocyst, an early-stage pre-implantation embryo. Human...

planet, Kandler presented his pre-cell theory, suggesting that the three domains of life did not emerge from an ancestral cell, e.g. the last universal common...

Sickle cell disease (SCD), also simply called sickle cell, is a group of hemoglobin-related blood disorders typically inherited. The most common type is...

Formation of the pre-RC is required for DNA replication to occur. Complete and faithful replication of the genome ensures that each daughter cell will carry...

Pre-B-cell leukemia homeobox (PBX) refers to a family of transcription factors. Types include: PBX1 PBX2 PBX3 PBX4 Pre-B cell "PBX1 PBX homeobox 1 [Homo...

the pre-TCR at the cell surface, they are independent of ligand binding to the pre-TCR. If the chains successfully pair a pre-TCR forms, and the cell downregulates...

has also been referred to as the pre-embryo in legal discourses including relevance to the use of embryonic stem cells. In the US the National Institutes...

from the division of pre-existing cells. Viruses are not considered in cell biology – they lack the characteristics of a living cell and instead are studied...

needed] Mature Th cells express the surface protein CD4 and are referred to as CD4+ T cells. CD4+ T cells are generally treated as having a pre-defined role...

Cell potency is a cell's ability to differentiate into other cell types. The more cell types a cell can differentiate into, the greater its potency. Potency...

The cell cycle, or cell-division cycle, is the sequential series of events that take place in a cell that causes it to divide into two daughter cells. These...

Transitions in Evolution RNA-based evolution Protocell or Pre-cell, the primordial version of a cell which confined RNA and later, DNA First universal common...

polymerases, in the nucleus of the cell. In eukaryotes, this mRNA is initially produced in a premature form (pre-mRNA) which undergoes post-transcriptional...

cell nucleus (from Latin nucleus or nuculeus 'kernel, seed'; pl.: nuclei) is a membrane-bound organelle found in eukaryotic cells. Eukaryotic cells usually...

Cell–cell interaction refers to the direct interactions between cell surfaces that play a crucial role in the development and function of multicellular...

Tom Clancy's Splinter Cell is a series of stealth action-adventure video games, the first of which was released in 2002, and their tie-in novels that were...

lineages, and every currently living cell. Carbon chauvinism Hypothetical types of biochemistry Nanobe Plasmid Pre-cell Protocell "What is Non-Cellular Life...

a DNA template in the cell nucleus by transcription. Pre-mRNA comprises the bulk of heterogeneous nuclear RNA (hnRNA). Once pre-mRNA has been completely...