Membrane biology

juxtamembrane domain (JM) and a catalytic domain. The extracellular region includes four immunoglobulin-like domains (Ig) and between the two last one a cysteine-rich domain (C6) represented in Figure 6B. Then it follows the TM, which is located in the membrane of the muscle fiber, the JM and the tyrosine kinase catalytic domain. MuSK is activated trough the large heparansulfate proteoglycan agrin, a motor neuron protein. But agrin does not directly bind to the receptor tyrosine kinase MuSK,…

significantly if the cell membrane could not penetrate the memory. This would cause the bacteria to be dysfunctional. When observing gram-positive bacteria one can perceive that the bacteria consist of teichoic acid, surface protein, lipoteichoic acid, peptide-glycan, cell membrane, and phospholipid. When observing the gram-negative bacteria one can note that this bacteria consist of lipopolysaccharide, surface protein, outer membrane, lipoprotein, peptide glycan, and cell membrane. These two…

It is expected that if the concentration of sucrose increases from 0.0 M, 0.2 M, 0.4 M, 0.6 M and 0.8 M (±0.01 g) in a 40 (±0.5) mL sucrose solution, then the average percent change in mass in Solanum tuberosum core will decrease. This is because if the Solanum tuberosum cores are placed in a hypotonic sucrose solution, which is described as having lower osmolarity, than the percent change in mass of the Solanum tuberosum core will increase due to the fact that water molecules will be moving…

one normal and one cystic fibrosis, and two cystic fibrosis, each affect the membrane proteins involved in transporting chloride ions through the cell membrane. Two normal genes would not alter whether or not the membrane proteins would correctly shield the chloride ions so that the ions could pass through the cell membrane. With this ability of the chloride ions successfully transporting across the cell membrane the body would not generate a thick mucus on the linings of the organs and…

The results of this experiment show that as the sucrose concentration of the potatoes increases, the potato appearance, shape, and flexibility increase. The qualitative observations show the flexibility of each potato before and after the incubation. The initial observations for the potato slivers were slightly stiff and high in flexibility. After leaving the 10 mL sucrose concentration solution for 45 minutes, the results show an increase in appearance, and flexibility of each individual potato…

When Kevlar is spun, the resulting fiber has a tensile strength of about 3,620 MPa,[13] and a relative density of 1.44. The polymer owes its high strength to the many inter-chain bonds. These inter-molecular hydrogen bonds form between the carbonyl groups and NH centers. Additional strength is derived from aromatic stacking interactions between adjacent strands. These interactions have a greater influence on Kevlar than the van der Waals interactions and chain length that typically influence the…

A. The cell membrane is made up of phospholipids, cholesterol, proteins, and carbohydrates. The phospholipids and cholesterol both help create the roof of the cell membrane and they both regulate the fluidity of the cell membrane. The proteins in the cell membrane help provide a structural function, transport function, and signaling function all within the membrane (Yeagle, 1989). The carbohydrates are on the external side of the cell membrane. Also the carbohydrates provide a signaling function…

include the cell membrane, cytoplasm, nuclear membrane, nucleus, ribosomes, mitochondria, small vacuoles, lysosomes, endoplasmic reticulum, and the golgi apparatus. We compared all of these organelles to a plastic bag, a toy animal, a large toy bear head, a highlighter, a noise maker, a medicine cup, a candle, a straw, and a box. To begin, a cell membrane controls movement in and out of the cell. It is a thin flexible layer that also supports and protects. We compared the cell membrane to a…

Separation of plasma proteins by molecular exclusion chromatography Sebastian Prisacariu 140013826 Introduction The components of blood is broken down into 3 parts. This breakdown is consisted of: Plasma which is a yellowish fluid that helps transport blood cells around the body and contains a small supply off proteins, platelets which are blood clotting agent, red blood cells which is a carry for oxygen and remover off carbon dioxide and white cells which is the bodies defence from infection…

motion. Kinetic energy causes molecules to bump into each other and move into different places. Diffusion is the random movement of molecules from an area of higher concentration to an area of lower concentration. Cells have selectively permeable membranes that only allow the movement of certain solutes. Diffusion is vital for many of life’s functions in a cell. It allows oxygen and carbon dioxide exchange in the lungs and between the bodies of intracellular fluid and cells. An example of this…