The chemical sequence "Z-Arg(NO2)-Pro-Lys(Z)-Pro-Gln-Gln-Phe-Phe-Gly-Leu-Arg(NO2)-OBzl" represents a peptide, which is a chain of amino acids. In this specific peptide, several amino acids are modified or protected with chemical groups to control their reactivity during synthesis. "Z" stands for a carbobenzoxy group, which is a protecting group used in peptide synthesis to prevent unwanted reactions at the amino group of the amino acid. "Arg(NO2)" indicates that the arginine amino acid has a nitro group (NO2) attached, which can be important for the peptide's biological activity or stability. "Lys(Z)" shows that the lysine amino acid also has a carbobenzoxy protecting group. The sequence includes other amino acids like proline (Pro), glutamine (Gln), phenylalanine (Phe), glycine (Gly), and leucine (Leu), which contribute to the peptide's structure and function. The "OBzl" at the end indicates that the peptide is capped with a benzyl group, which can protect the peptide's carboxyl group or be used for purification purposes. This peptide is likely part of a larger study or application in biochemistry or pharmaceuticals, where its specific sequence and modifications are designed to achieve a particular effect or function.
The CAS Registry Mumber 82155-81-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,2,1,5 and 5 respectively; the second part has 2 digits, 8 and 1 respectively. Calculate Digit Verification of CAS Registry Number 82155-81: (7*8)+(6*2)+(5*1)+(4*5)+(3*5)+(2*8)+(1*1)=125 125 % 10 = 5 So 82155-81-5 is a valid CAS Registry Number.