In cells, DNA often exists in the form of double stranded helices, and in its active state, it may appear in a single stranded form, participating in biological processes such as replication and transcription. SsDNA (single stranded DNA), also known as single stranded DNA, can be used as a template for homology directed repair (HDR)…
The function of proteins is programmed and determined by the genetic information of organisms, which have evolved in nature. However, the characteristics formed during natural selection and evolution sometimes do not meet the strict standards and conditions required in industrial production or medical applications. For example, insufficient protein stability in extreme industrial environments, or direct…
What are the minimum genes required for a cell to survive? To answer this question, researchers adopted a design build test cycle strategy to synthesize a Mycoplasma filamentosum chromosome containing only 473 genes, and it can replicate and produce free living bacterial cells during the experimental observation cycle [2]. This smallest cell removed 428 genes…
April 25th is DNA day, a big day in the history of biology, because 68 years ago, on April 25th, 1953, James Watson, Francis Crick, and their colleagues published a paper on the double helix structure of DNA in Nature. Since then, the mystery of DNA structure that has plagued generations has been solved, and…
Plasmid DNA is a small double stranded circular DNA molecule that is exposed (without protein binding), structurally simple, independent of bacterial nucleoid DNA, and has the ability to self replicate. Image plasmids usually carry only a small number of genes, especially those related to antibiotic resistance; In addition, plasmids can be transmitted between different bacterial…
1、 DNA source The double stranded length of DNA is commonly described in units of bp, Kb, Mb, and Gb. 1bp=one base pair; 1kb=1000bp; 1Mb=1000kb; 1Gb=1000Mb. The length of a single stranded DNA is represented by nt, where 10nt=10 base lengths of a single stranded DNA. 1. Genomic DNA (gDNA) Eukaryotes, double stranded linear DNA…
In recent years, CRISPR gene editing technology has attracted great attention due to its enormous potential in the treatment of hereditary diseases. However, the potential off target effects that may occur during gene editing have always been an important safety concern. In addition, different populations have different genetic information, which poses great difficulties in accurately…
CRISPR gene editing is widely recognized as the most significant and groundbreaking breakthrough in life science since the 21st century. It was officially born in 2012 and was recognized by the Nobel Prize in just 8 years. At the end of last year, the first CRISPR based gene editing therapy was approved by the FDA…
01 FDA approved new gene editing therapy for the treatment of OTC deficiency in clinical practice On April 4, 2024, the FDA approved the clinical study approval application for ECUR-506 for the treatment of neonatal patients with ornithine aminotransferase (OTC) deficiency. OTC deficiency, also known as hyperammonemia type II, is an X-linked genetic disease caused…
Colorectal cancer (CRC) is one of the main cancers that threaten life and health, causing a serious social burden. Long term use of NSAIDs can significantly reduce its incidence rate, but it can not be completely prevented and treated. Resection is an early intervention measure that can be combined with chemotherapy and radiation therapy, but…