Search Results

Search Results

Refine this search

2,753 results

Image

from article Mutagens and carcinogens

Result thumbnail
Proflavin is a chemical disinfectant agent against bacteria, causing mutagenic DNA changes (such as the insertion or deletion of a DNA base pair). However, it is carcinogenic in mammals. Thus, it is used only for the disinfecting of surfaces or for…

Image

from article Mutagens and carcinogens

Result thumbnail
Model of carcinogenesis. Changes often occur in the growth properties of normal cells, leading to cancer cells that are not responsive to normal regulatory controls and can eventually give rise to a visible neoplasm or tumor. The main stages of the…

Image

from article Autophagy

Result thumbnail
Modes of autophagy in yeast and mammalian cells. Macroautophagy involves the uptake of cytoplasm at a site away from the lysosome or vacuole. The origin of the sequestering membrane is not known, but it likely includes multiple sources such as the…

Image

from article Autophagy

Result thumbnail
Basic steps involved in macroautophagy, shown with the structural intermediates. See the text for full details.

Image

from article Autophagy

Result thumbnail
The cytoplasm-to-vacuole targeting (Cvt) pathway is an example of selective autophagy. The schematic illustrates the steps of the Cvt pathway and also shows electron micrographs of the sequestration event. Precursor aminopeptidase I (prApe1) forms a…

Image

from article Autophagy

Result thumbnail
Atg8 tagged with white fluorescent protein (GFP-Atg8) can be used to monitor autophagosome formation. Cells in growing conditions (for example, in the presence of nitrogen; +N) carry out a basal level of macroautophagy and typically display a single…

Image

from article Cell cycle

Result thumbnail
Phases of the eukaryotic cell cycle. Interphase is subdivided into three phases: gap phase 1 (G1), synthesis (S), and gap phase 2 (G2). M phase, which follows interphase, consists of mitosis (nuclear division) and cytokinesis (cell division). G0…

Image

from article Cell cycle

Result thumbnail
During cytokinesis (cell division), the cell pinches into two parts between the separated daughter nuclei. At the end of this process, the two daughter cells often remain tethered by a thin "midbody" of microtubules. Once this midbody breaks, the…

Image

from article Cell cycle

Result thumbnail
Behavior of various Cdk/cyclin complexes and their cellular events. (Copyright © McGraw Hill)

Image

from article Pituitary gland

Result thumbnail
The pituitary, also known as the hypophysis, is a pea-sized gland situated at the base of the brain. The hypothalamus is designed and anatomically positioned to receive a diversity of messages from external and internal sources that can be…

Learn more about AccessScience

a female college student looking at the screen of her silver-cased laptop computer
Watch the YouTube video

flyer thumbnail

Download the flyerGet Adobe Acrobat Reader pdf icon