The chemical sequence "Z(OMe)-Gln-Asp(OBzl)-Val-His-Asn-Phe-Val-Ala-Leu-Gly-OBzl" represents a peptide, which is a chain of amino acids. In this specific peptide, the amino acids are linked together in the following order: Glutamine (Gln), Aspartic acid (Asp), Valine (Val), Histidine (His), Asparagine (Asn), Phenylalanine (Phe), Valine (Val), Alanine (Ala), Leucine (Leu), and Glycine (Gly). The "Z(OMe)" and "OBzl" groups are protecting groups used in peptide synthesis. "Z(OMe)" is a benzyloxycarbonyl group with a methoxy substituent, which protects the amino group of the first amino acid, while "OBzl" is a benzyl ester group that protects the carboxyl group of the last amino acid. These protecting groups are crucial for the controlled synthesis of peptides, as they prevent unwanted side reactions and ensure that the peptide is formed in the correct sequence. Once the peptide is synthesized, the protecting groups can be removed to reveal the free amino and carboxyl groups, allowing the peptide to function as intended.
The CAS Registry Mumber 78233-09-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,2,3 and 3 respectively; the second part has 2 digits, 0 and 9 respectively. Calculate Digit Verification of CAS Registry Number 78233-09: (7*7)+(6*8)+(5*2)+(4*3)+(3*3)+(2*0)+(1*9)=137 137 % 10 = 7 So 78233-09-7 is a valid CAS Registry Number.