"Z-Ile-Arg(Mds)-Pro-Lys(Boc)-OH" is a peptide sequence consisting of five amino acids: Isoleucine (Ile), Arginine (Arg) with a 4-Methanesulfonyl (Mds) group, Proline (Pro), and Lysine (Lys) with a tert-Butoxycarbonyl (Boc) group, and a terminal hydroxyl (OH) group. The "Z" group is a protecting group for the N-terminal amino group, which is commonly used in peptide synthesis to prevent unwanted side reactions. This specific sequence is of interest in the field of peptide chemistry, potentially for the development of pharmaceuticals or for studying protein-protein interactions. The Mds and Boc groups are temporary modifications that protect the side chains of Arg and Lys, respectively, during the synthesis process, and are removed later to reveal the free amino groups.
The CAS Registry Mumber 80220-23-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,2,2 and 0 respectively; the second part has 2 digits, 2 and 3 respectively. Calculate Digit Verification of CAS Registry Number 80220-23: (7*8)+(6*0)+(5*2)+(4*2)+(3*0)+(2*2)+(1*3)=81 81 % 10 = 1 So 80220-23-1 is a valid CAS Registry Number.