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Cosa sono le cellule?
Cells are the foundational level of organization of life. An organism may be unicellular, as with prokaryotes and most eukaryotic protists, or…
Dimensioni cellulari
The size of cells varies widely among and within organisms. For instance, the smallest bacteria are 0.1 micrometers (μm) in diameter—about a…
Compartimentazione delle cellule eucariotiche
One of the distinguishing features of eukaryotic cells is that they contain membrane-bound organelles—such as the nucleus and…
Cellule procariotiche
Prokaryotes are small unicellular organisms in the domains Archaea and Bacteria. Bacteria include many common organisms such as Salmonella and…
Citoplasma
The cytoplasm consists of organelles, an aqueous solution called the cytosol, and a framework of protein scaffolds called the cytoskeleton. The…
Il Nucleo
The nucleus is a membrane-bound organelle that contains a eukaryotic organism’s genetic instructions in the form of chromosomal DNA. This is…
Reticolo endoplasmatico
The Endoplasmic Reticulum (ER) in eukaryotic cells is a substantial network of interconnected membranes with diverse functions, from calcium storage…
Ribosomi
Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells…
Apparato di Golgi
As they leave the Endoplasmic Reticulum (ER), properly folded and assembled proteins are selectively packaged into vesicles. These vesicles are…
Microtubuli
There are three types of cytoskeletal structures in eukaryotic cells—microfilaments, intermediate filaments, and microtubules. With a diameter…
Mitocondri
Mitochondria and peroxisomes are organelles that are the primary sites of oxygen usage in eukaryotic cells. Mitochondria carry out cellular…
Giunzioni comunicanti
Multicellular organisms employ a variety of ways for cells to communicate with each other. Gap junctions are specialized proteins that form pores…
La matrice extracellulare
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM).…
Tessuti
Cells with similar structure and function are grouped into tissues. A group of tissues with a specialized function is called an organ. There are four…
Parete cellulare vegetale
The plant cell wall gives plant cells shape, support, and protection. As a cell matures, its cell wall specializes according to the cell type. For…
Plasmodesma
The organs in a multicellular organism’s body are made up of tissues formed by cells. To work together cohesively, cells must communicate. One…
Da costrutti a cristalli - Verso Struttura Determinazione della β-canna esterna proteine ​​di membrana
Membrane proteins serve important functions in cells such as nutrient transport, motility, signaling, survival and virulence, yet constitute only ~1%…
Studi struttura-funzione nel topo cellule staminali embrionali Uso ricombinasi mediata Cassette Scambio
Gene engineering in mouse embryos or embryonic stem cells (mESCs) allows for the study of the function of a given protein. Proteins are the…
Isolamento di esosomi dal plasma di HIV-1 individui positivi
Exosomes are small vesicles ranging in size from 30 nm to 100 nm that are released both constitutively and upon stimulation from a variety of cell…

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