"Z-Arg(Mbs)-Pro-Pro-Gly-Phe-Ser(Bzl)-Pro-Phe-Arg(Mbs)-ONBzl" is a peptide sequence consisting of 11 amino acids. It is a synthetic compound with a specific arrangement of amino acids, each denoted by its three-letter code and, in some cases, a protecting group. The sequence starts with Z-Arg(Mbs), indicating that the arginine is N-terminally protected with a methylbenzyl group. The sequence continues with proline (Pro), another proline, glycine (Gly), phenylalanine (Phe), and serine (Ser) with a benzyl protecting group. The sequence then includes another proline, phenylalanine, and ends with Arg(Mbs), another arginine with a methylbenzyl protecting group, and an N-benzyloxycarbonyl (ONBzl) group. This peptide is likely used in research or pharmaceutical development, where the protecting groups are crucial for preventing unwanted side reactions during synthesis and are removed at a later stage to reveal the free amino groups.
The CAS Registry Mumber 75759-88-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,7,5 and 9 respectively; the second part has 2 digits, 8 and 8 respectively. Calculate Digit Verification of CAS Registry Number 75759-88: (7*7)+(6*5)+(5*7)+(4*5)+(3*9)+(2*8)+(1*8)=185 185 % 10 = 5 So 75759-88-5 is a valid CAS Registry Number.