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A protein ladder is another type of protein standard. They are almost always stained. [14] Protein ladders differ from molecular markers in that they are composed of a mixture of highly purified proteins whose specifications are known and correspond to whole numbers. [14] Generally protein ladders are composed of 10-12 proteins. [14]
Sequencing technologies vary in the length of reads produced. Reads of length 20-40 base pairs (bp) are referred to as ultra-short. [2] Typical sequencers produce read lengths in the range of 100-500 bp. [3] However, Pacific Biosciences platforms produce read lengths of approximately 1500 bp. [4] Read length is a factor which can affect the results of biological studies. [5]
Agarose gel has large pore size and good gel strength, making it suitable as an anticonvection medium for the electrophoresis of DNA and large protein molecules. The pore size of a 1% gel has been estimated from 100 nm to 200–500 nm, [4] [5] and its gel strength allows gels as dilute as 0.15% to form a slab for gel electrophoresis. [6]
Invitrogen was founded in 1987 by Lyle Turner, Joe Fernandez, and William McConnell and was incorporated in 1989. The company initially found success with its kits for molecular cloning—notably, The Librarian, a kit for making cDNA libraries, and the FastTrack Kit for mRNA isolation from biological samples.
The synthesis rate of Taq polymerase is around 60 base pairs per second. Among the unmodified thermostable DNA polymerases, only the synthesis rate of KOD polymerase is above 100 base pairs per second (approx. 120 bp/s). [11] Among the modified thermostable DNA polymerases, various mutations have been described that increase the synthesis rate.
The first step in Gateway cloning is the preparation of a Gateway Entry clone. There are a few different ways to make entry clone. Gateway attB1 and attB2 sequences are added to the 5' and 3' end of a gene fragment, respectively, using gene-specific PCR primers and PCR amplification. The PCR amplification products are then mixed with a propriet
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SYBR Green I (SG) is an asymmetrical cyanine dye [1] used as a nucleic acid stain in molecular biology.The SYBR family of dyes is produced by Molecular Probes Inc., now owned by Thermo Fisher Scientific.