Sentences with phrase «cells form only»

Under normal conditions, pluripotent frog cells form only skin tissue.

Untreated, these cells formed only epidermis, when transplanted to either the flank or eye field.

Not exact matches

Yet the latter form, which is present some eight weeks after fertilization, is not only ethically unacceptable for research but also far too old to yield embryonic stem cells.»

Only whole cells may contain all the necessary machinery for self - reproduction... Not only is DNA incapable of making copies of itself, aided or unaided, but it is incapable of «making» anything else... The proteins of the cell are made from other proteins, and without that protein - forming machinery nothing can be made.&raOnly whole cells may contain all the necessary machinery for self - reproduction... Not only is DNA incapable of making copies of itself, aided or unaided, but it is incapable of «making» anything else... The proteins of the cell are made from other proteins, and without that protein - forming machinery nothing can be made.&raonly is DNA incapable of making copies of itself, aided or unaided, but it is incapable of «making» anything else... The proteins of the cell are made from other proteins, and without that protein - forming machinery nothing can be made.»

Only 10 % of the cells in and on your body are human, the other 90 % is the trillions of life forms that inhabit and live on your body... some of them can kill you if they get too numerous.

Evidence of the fact that union differentiates is to be seen all round us — in the bodies of all higher forms of life, in which the cells become almost infinitely complicated according to the variety of tasks they have to perform; in animal associations, where the individual «polymerises» itself, one might say, according to the function it is called upon to fulfil; in human societies, where the growth of specialization becomes ever more intense; and in the field of personal relationships, where friends and lovers can only discover all that is in their minds and hearts by communicating them to one another.

In this sense an atom is more complex than an electron, a molecule more complex than an atom, and a living cell more complex than the highest chemical nuclei of which it is composed, the difference depending (on this I insist) not only on the number and diversity of the elements included in each case, but at least as much on the number and correlative variety of the links formed between these elements.

============ CONCLUSIONS A. # 1 is an accepted scientific fact, by theists and atheists, importantly: it does not in and of itself describe how we got from initial proto - cell to current complexity B. # 2 has a severe flaw, as phyletic gradualism is dead, and punctuated equilibrium (the fossil record being characterized by new species appearing fully formed) is an accepted fact C. # 3 is the ONLY theory that has support from the fossil record

Typically, vitamin B - 12 is found only in animal foods, making it a difficult nutrient for vegans to get in their diet, but it's essential for making red blood cells, as it keeps your nerve cells healthy and is essential for forming DNA.

At birth, the only existing parts of breast anatomy are the milk ducts within the nipple — the alveoli, or milk - producing cells — have not yet formed and not a lot of changes will happen now until the onset of puberty.

The AR - V7 variant is formed when an androgen receptor loses the end part of the receptor, called the C - terminal end; this is deleted due to an error in RNA processing in tumour cells, leaving only the beginning part of the receptor, the N - terminal end.

The most common cells found in healing wounds are myofibroblasts, which were thought to only form a scar.

The research team found that when it increased levels of E-NTPDase2 in tadpole embryos that consisted of only eight cells, they could cause parts of the eye to form not only on the heads of the amphibians, but also in tissues in other parts of their bodies, including their tails.

So far, gene therapy attempts have only resulted in partial improvements of hearing in mouse models of specific human deafness forms that did not include severe anomalies in hair cell structure.

Letian Dou, a chemical engineer at Purdue University, and colleagues were only able to form these light - harvesting crystals in their solar cells by cranking the heat to 105 ° Celsius, much hotter than your average sun - blasted window.

In a one - in - a-million event, only slightly more likely than running into a flying reindeer, the coral DNA might have moved from her blood into a virus - like genetic element that transferred it into the egg cell that formed Rudolph.

Previously, scientists had believed that the first of these complex creatures did not appear until almost a billion years later, and that single - celled microbes were the only life - form before then.

Researchers at Dana - Farber / Boston Children's Cancer and Blood Disorders Center report promising outcomes from a clinical trial with patients with a rare form of bone marrow failure who received a hematopoietic stem cell transplant (HSCT) after pre-treatment with immunosuppressive drugs only.

Microtubules, hollow fibers of tubulin protein only a few nanometers in diameter, form the cytoskeletons of living cells and play a crucial role in cell division (mitosis) through their ability to undergo rapid growth and shrinkage, a property called «dynamic instability.»

Microtubules not only confer mechanical stability on cells and help to dictate their forms, they also serve as an intracellular transport network.

In rats and tissue cultures of human nerve cells, these «beta sheet breakers» not only prevent amyloid plaques from forming, but also dissolve existing plaques.

The results of the study were obtained by infecting laboratory - grown cells with forms of the CMV virus which differed only by the removal of a single gene.

Experiments in cells with an inactivated form of Argonaute — which contributes only to the antiviral and not the gene regulation activity of RNAi — confirmed that they were observing an antiviral RNAi response.

They used mice and cartilage cells in a dish to study one mutant form of IDH that is identified only in cartilage cells.

They also tested other chemicals known to prevent the other two forms of cellular suicide, but only CGP3466B protected mouse nerve cells in the brain from death by cocaine.

Some scientists have blamed so - called cancer stem cells, a subset of cancer cells that might be able to remain dormant, evading chemotherapy or radiation treatments, only to form new tumors months or years later.

In eight of the patients, normal cells showed one mutated NF1 gene and one normal gene, while cancerous cells had only the mutated form.

The newly discovered Merkel cell - nerve ending synapse is unique, Gu says, «because it is the only example of a synapse formed between a non-neuronal cell and a nerve cell, and it is the first synapse that is found underneath the skin.»

By providing a first look at the structure of the protein complex that includes FGF23 and its co-receptors, the FGF receptor and a-Klotho, the most recent study challenges the long - accepted belief that only the cell - attached form of aKlotho can serve as a receptor for FGF23 and hence that FGF23 action is restricted to tissues having the cell - attached form.

Not only did the normal mice develop plaques, but also a pathology similar to «tangles» — twisted protein strands that form inside brain cells, disrupting their function and eventually killing them from the inside - out.

«Our results not only demonstrate a potential mechanism for the development of neurodegenera - tive disorders but we have also found another example of the way in which proteins can form aggregates and damage the cell.

Others, like that of Stigmatella aurantiaca, are more complex branching structures in which some cells form the support structure and only some get to form spores.

Conventional wisdom has long held that adult stem cells are only capable of forming their tissue of origin.

Only a small portion of cancer cells can form new tumors or metastases, and these are called «cancer stem cells.»

Currently, the group is trying to discover chemical forms of stabilizing haploidy in animal cells and is exploring strategies that would allow the creation of organs or even animals that only have a maternal set of chromosomes.

Not only do brain cells alter their connections, but additional neurons can also spontaneously form, a process called neurogenesis.

Only after the cell's inbuilt protective mechanisms have been switched off and dosage amplification occurs does a tumor ultimately form.

Depending on the person, particular cells in the medial temporal lobe — an area critical to forming long - term memories — get fired up only by, for example, images of

Currently, there is no cure to stop or reverse any form of muscle - wasting disorders — only medication and therapy that can slow the process,» said Vittorio Sartorelli, M.D., chief of the Laboratory of Muscle Stem Cells and Gene Regulation and deputy scientific director at the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS).

In all land vertebrates (including humans), spines form from only one group of cells called somites.

A new drug that targets not only common cancer - causing genetic mutations in patients with non-small cell lung cancer (NSCLC), but also a form of the mutation that causes resistance to treatment, has shown promising results in patients in a phase I / II clinical trial.

Naïve stem cells are blank slates that form the basis for not only all the cells of the human body, but cells that make up the placenta to support an embryo as well.

The finding that normal fertilization can result in embryos containing cells with different parental sets of chromosomes is a new mechanism for chimerism, which was previously thought to occur only as the result of fertilization errors, for example, the fusion of multiple sperm or eggs to form an embryo.

There, the fuel cell forces the hydrogen electrons through a circuit, generating current and powering the motor before the electrons rejoin the hydrogen protons and oxygen to form the car's only emission: water.

Are single cells like transistors in a computer or pixels on a television screen, contributing just minute pieces of information that only when combined with the output of thousands or millions of other cells form the complex pattern that means Rocky?

Not only did increased stress relaxation dramatically increase early osteogenic differentiation but those cells continued to grow as bone cells weeks after their initial differentiation and formed an interconnected mineralized matrix rich in collagen, key structural features of bone.

Additionally, a form of indolent B cell lymphoma, which progresses slowly with only mild symptoms, can transform without warning into an aggressive form of the disease.

Not only could it form healthy tissue scaffolds, allowing cells to successfully grow and adhere to it, but it was also thermally stable at room temperature.

In meiosis, a precursor cell — primordial germ cell — produces four spermatozoids during spermatogenesis, while only one oocyte is formed during oogenesis (the other three cells die during the process).

An often - desired suntan can only form with the aid of the enzyme tyrosinase inside these pigmented cells.