Thymidine 3'-diphosphoric acid, also known as dTDP, is a nucleotide composed of a thymidine base, a ribose sugar, and two phosphate groups. It plays a crucial role in DNA synthesis as a precursor for the incorporation of thymidine into the growing DNA strand during replication. dTDP is formed when thymidine is phosphorylated by the enzyme thymidine kinase, which adds a phosphate group to the 5' position of the ribose sugar. This initial phosphorylation is followed by a second phosphorylation step, catalyzed by nucleoside diphosphate kinase, which transfers a phosphate group from another nucleoside triphosphate to the 3' position of the ribose sugar, resulting in the formation of dTDP. This molecule is essential for DNA replication and repair processes, as it provides the necessary building blocks for the synthesis of new DNA strands.
The CAS Registry Mumber 978-33-6 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 9,7 and 8 respectively; the second part has 2 digits, 3 and 3 respectively. Calculate Digit Verification of CAS Registry Number 978-33: (5*9)+(4*7)+(3*8)+(2*3)+(1*3)=106 106 % 10 = 6 So 978-33-6 is a valid CAS Registry Number.
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