Membrane growth in Visual Studio .NET

Creator QR Code 2d barcode in Visual Studio .NET Membrane growth

Membrane growth
Quick Response Code Encoder In .NET Framework
Using Barcode creator for .NET Control to generate, create QR Code image in .NET applications.
Scanning QR In .NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in .NET applications.
As cells grow, their membranes need to grow also The cell somehow needs to add lipid molecules to the bilayer Lipids are synthesized in the cell interior through a series of biochemical reactions mediated by enzymes The resulting lipids aggregate to form liposomes The lipids are then added to the membrane by fusing the liposomes with the existing membrane See Fig 11-9 As their membranes grow, cells need to incorporate additional protein and other molecules that are part of the membrane structure This can be done in a variety of ways Some relatively hydrophobic proteins and glycolipids are able to simply penetrate the bilayer due to a favorable Gibbs energy change Once inside the bilayer the hydrophobic effect helps to keep them in place Sometimes proteins are inserted into the cell membrane while still in the form of a polypeptide chain, before the protein folds into its native state The fact that protein synthesis typically takes place just below the surface of the cell membrane facilitates this process Once the protein is inside the bilayer, the Gibbs
Creating Barcode In .NET
Using Barcode maker for Visual Studio .NET Control to generate, create barcode image in .NET applications.
Barcode Scanner In VS .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
B i o p h y s i c s D e mys tifie D
Denso QR Bar Code Drawer In C#.NET
Using Barcode drawer for .NET framework Control to generate, create QR image in Visual Studio .NET applications.
QR Maker In VS .NET
Using Barcode maker for ASP.NET Control to generate, create Denso QR Bar Code image in ASP.NET applications.
Unfused
Printing QR Code ISO/IEC18004 In Visual Basic .NET
Using Barcode encoder for .NET Control to generate, create Quick Response Code image in VS .NET applications.
Painting Bar Code In VS .NET
Using Barcode printer for VS .NET Control to generate, create barcode image in VS .NET applications.
Hemifused
Code 128 Printer In VS .NET
Using Barcode generation for .NET framework Control to generate, create Code 128 Code Set A image in Visual Studio .NET applications.
Encode UPC-A In VS .NET
Using Barcode creator for .NET Control to generate, create UPC Symbol image in VS .NET applications.
Fully fused
1D Generator In .NET Framework
Using Barcode creation for Visual Studio .NET Control to generate, create 1D image in .NET framework applications.
Printing Case Code In VS .NET
Using Barcode creator for VS .NET Control to generate, create UCC - 14 image in .NET framework applications.
Figure 11-9 Fusion of two liposomes The process is the same for a liposome fusing with an existing larger membrane
Code 128C Generator In VB.NET
Using Barcode drawer for Visual Studio .NET Control to generate, create Code 128A image in .NET applications.
EAN 13 Encoder In None
Using Barcode maker for Excel Control to generate, create EAN13 image in Excel applications.
energy change of protein folding becomes favorable At the same time, the folding of the protein typically further stabilizes its position in the bilayer making it unfavorable for the protein to exit the bilayer
Code 39 Printer In Java
Using Barcode maker for Java Control to generate, create Code 3/9 image in Java applications.
Bar Code Generator In None
Using Barcode maker for Software Control to generate, create barcode image in Software applications.
Membrane Permeability and Transport
Create GTIN - 13 In Java
Using Barcode generator for Android Control to generate, create EAN-13 image in Android applications.
Data Matrix 2d Barcode Encoder In None
Using Barcode maker for Microsoft Excel Control to generate, create DataMatrix image in Excel applications.
Let s revisit the idea of bilayer permeability and the need to transport molecules across membranes As we noted earlier in this chapter, the lipid bilayer is semipermeable, meaning that some molecules can pass through the bilayer while others can t Sometimes biological membranes are described as selectively
Bar Code Drawer In Objective-C
Using Barcode creation for iPhone Control to generate, create bar code image in iPhone applications.
GS1 128 Creator In Java
Using Barcode maker for Java Control to generate, create GS1 128 image in Java applications.
chapter 11 M e M B r a n e B i o p h y s i c s
permeable, meaning that the cell somehow chooses what to let in, what to let out, what to keep in, and what to keep out The cell does this with a combination of active and passive transport Active transport means that the cell expends energy to move a molecule or ion across the membrane that would otherwise not favorably move across the membrane Passive transport means that the molecule or ion passes through the membrane by virtue of a favorable Gibbs energy change without the need for the cell to expend any energy
Passive Transport
In the case of passive transport there are two important points to keep in mind The first is that sometimes passive transport is the result of some earlier active transport In other words, the cell regularly expends energy moving molecules against an otherwise unfavorable Gibbs energy change Later, when the needs of the cell require it, the cell allows the molecules to flow in the direction of a favorable Gibbs energy change via passive transport This type of passive transport may be for the purpose of simply adjusting the concentration of an ion or molecule But that is usually not the case Rather this type of passive transport is more commonly used as the driver of a secondary active transport In secondary active transport, the energy released from a passive transport is used to drive an active transport The second point to know regarding passive transport is that it is not always a simple diffusion or movement through the lipid bilayer (combined with a favorable Gibbs energy change) Instead, passive transport can occur as the result of a tunnel, or channel, created through the membrane by the presence of transport protein An example is shown in Fig 11-10 Transport proteins can be involved in either active or passive transport Transport proteins involved in passive transport contain a combination of hydrophobic and hydrophilic amino acid residues The sequence of resides and the forces involved in protein folding cause the protein to fold in a way that creates a tunnel or channel through the center of the folded protein The hydrophobic residues are in the outside of the protein exposed to the hydrophobic portion of the bilayer The hydrophilic residues are on the inside of the protein, away from the hydrophobic lipid chains These hydrophilic residues line the walls of the channel through the center of the protein There are also usually some hydrophilic residues near the openings of the channel at each end of the transport protein These may form hydrogen bonds with the phosphate head groups and help to keep the protein oriented so that the transport channel remains perpendicular to the plane of the bilayer (see Fig 11-10)
Copyright © OnBarcode.com . All rights reserved.