The given sequence "Z(OMe)-Asp(OBzl)-Arg(Mts)-Ile-Gly-Ala-Gln-Ser-Gly-Leu-Gly-Cys(Tmb)-Asn-Ser-Phe-Arg(Mts)-Tyr-OBzl" represents a peptide, which is a chain of amino acids. This particular peptide is modified with various chemical groups: Z(OMe) indicates a methyl ester group attached to the N-terminus, Asp(OBzl) has a benzyl ester on the side chain carboxylic acid, Arg(Mts) has a 2-mercapto-4,6-dimethylpyrimidinyl protecting group on the guanidinium group, Cys(Tmb) has a thiomethylbutyryl group on the thiol group, and Tyr-OBzl has a benzyl ether protecting group on the phenolic hydroxyl group. These modifications are commonly used in peptide synthesis to protect certain functional groups during the assembly process, ensuring that the peptide is synthesized correctly and that the desired chemical properties are maintained. The sequence includes a variety of amino acids, such as isoleucine (Ile), glycine (Gly), alanine (Ala), glutamine (Gln), serine (Ser), leucine (Leu), asparagine (Asn), phenylalanine (Phe), and tyrosine (Tyr), which contribute to the peptide's structure and function. The specific arrangement and modifications of these amino acids are crucial for the peptide's biological activity and stability.
The CAS Registry Mumber 99236-61-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,2,3 and 6 respectively; the second part has 2 digits, 6 and 1 respectively. Calculate Digit Verification of CAS Registry Number 99236-61: (7*9)+(6*9)+(5*2)+(4*3)+(3*6)+(2*6)+(1*1)=170 170 % 10 = 0 So 99236-61-0 is a valid CAS Registry Number.