The chemical "Z-Arg(Mbs)-Pro-Pro-D-Ala-Phe-Ser(Bzl)-Pro-Phe-Arg(Mbs)-ONBzl" is a peptide sequence consisting of 11 amino acids. It features a Z-group (benzyloxycarbonyl) protecting group at the N-terminus, which is commonly used in peptide synthesis to prevent unwanted side reactions. The sequence includes two Arginine (Arg) residues with Mbs (4-methylbenzenesulfonyl) protecting groups, which are used to protect the guanidinium group of Arginine. The peptide also contains Proline (Pro), D-Alanine (D-Ala), Phenylalanine (Phe), Serine (Ser) with a benzyl (Bzl) protecting group, and another Proline. The C-terminus is modified with an ONBzl (N-benzyloxycarbonyl) group. This specific sequence and the presence of protecting groups indicate that it is likely a synthetic peptide designed for a specific biological or pharmaceutical application, where the protecting groups will be removed at appropriate stages of the synthesis process to reveal the active peptide.
The CAS Registry Mumber 76523-93-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,6,5,2 and 3 respectively; the second part has 2 digits, 9 and 3 respectively. Calculate Digit Verification of CAS Registry Number 76523-93: (7*7)+(6*6)+(5*5)+(4*2)+(3*3)+(2*9)+(1*3)=148 148 % 10 = 8 So 76523-93-8 is a valid CAS Registry Number.