File extension .AB1
| Full Name | Developer | Category |
|---|---|---|
| DNA Electropherogram Format | N/A | Data Files |
The .AB1 file extension is used for DNA electropherograms. This type of file is created with the Sequencing Analysis Software Bio-Rad, and contains DNA "reads" or sequences from automated sequencers that are used by labs specializing in genetic bio-informatics. The data stored in the .AB1 file includes dye concentration, peak information, sample data, and the actual sequence data. The file is text based and can be opened using a text editor like WordPad.
Structure & Content of AB1 Files
A .AB1 files contains several thousand bytes of data. It starts with an 8 byte preamble that is followed by an arbitrary number of records. Each record consists of four parts: Read Descriptor, Trace Data, Peak Data and Sequencing Data. The Read Descriptor is a 4-byte field, followed by the trace data which consists of multiple 256-byte records. Peak data follows and ends with the sequencing data which is usually 3000-4000 bytes long. In addition to the actual sequence data, .AB1 files also contain additional information, such as quality scores. Other related file extensions are .SCF, BA2, .MSF, and .STK.
Uses of AB1 Files
.AB1 files are mainly used for storing automated DNA sequencing results. These files are typically generated by sequencers that use fluorescence based technologies. They are sometimes referred to as “abif” files, although strictly speaking they are not the same format. Lab technicians also use these files to analyze gene allele characteristics, centromere mapping, base pair analysis, etc.
Programs for WINDOWS system
Programs for MAC system
After installing the required software, the operating system will usually automatically associate an unknown file type (in this case .AB1) with the new application. If this does not happen, we can help the system a bit by selecting the software for it, which it should always use to open files with the .AB1 extension.
When choosing the software we can select the system to use this software every time.
Remember!
Using it for the first time it is good to check whether the .AB1 file opened in the application can be read by us and opens in a way that allows us to use it. If everything is in order, select this option the next time you open a file with the .AB1 extension. However, if the file has not opened correctly, we have to look for a different software, with which we can open files with the .AB1 extension. Select a different software from our list and install it on your computer. After the software is installed, repeat inspection openings of a .AB1 file. Sometimes you have to repeat the operation several times.
Other instructions
If none of the programs listed by us to work with the .AB1 file has not meet your expectations, you can try searching other websites. But remember to avoid downloading programs "that can open any file". These applications not only have very limited functionality, but may also expose you to expense tens of dollars when purchasing a license.
In the vast majority of cases you will find the program dedicated to support the .AB1 file, or any other file format. In addition, there is a chance that it will be a free program, and its functionality (concerning the .AB1 file) will be extended to the maximum.
It is also good to check
- if the .AB1 file has no errors
- or if it has been copied (or downloaded by the browser) thoroughly
Author’s guidelines
Mr B. Adam
Author of the guidelines / Founder of FileExtension.info
New technologies enthusiast, helping to solve problems with the files.
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