1, located at the 5' end of mRNA, was added immediately after transcription. This hat structure is very important for stabilizing mRNA, promoting translation initiation and preventing endonuclease degradation.
2. This is a statement about the hat structure of mRNA in eukaryotic cells. It shows that the component of the mRNA hat structure in eukaryotic cells is 7- methylguanosine triphosphate, and explains the important functions of this hat structure, including stabilizing mRNA, promoting translation initiation and avoiding degradation by endonucleases.
3. Nucleoside is the condensation product of purine or pyrimidine base and ribose, and the 5- hydroxyl group on ribose of this condensation product forms ester with tripolyphosphate to form nucleoside triphosphate.
Nucleoside triphosphate definition:
1, and nucleoside triphosphate (NTP) is a nucleotide containing three phosphate groups. Common forms in nature include adenosine triphosphate (ATP), guanosine triphosphate (GTP), cytidine triphosphate (CTP), thymidine triphosphate (TTP) and uridine triphosphate (UTP).
These molecules contain a ribose. If ribose is replaced by normal deoxyribose, nucleoside triphosphate will become deoxynucleoside triphosphate and be written as dNTP, such as deoxyadenosine triphosphate (dATP) and deoxyguanosine triphosphate (dGTP).
3. The molecular formula of 3.ATP is c10h16N5o13p3, the chemical abbreviation is c10h8n4o2nh2 (OH) 2 (po3h) 3h, and the molecular weight is 507. 184. These three phosphate groups are divided into α, β and γ phosphate groups from adenosine.
4. The chemical name of 4.ATP is 5'- triphosphate -9-β-D- furfuryl adenine or 5'- triphosphate -9-β-D- furfuryl -6- aminopurine.