The chemical sequence "Z-Arg(NO2)-Pro-Lys(Z)-Pro-Gln-Gln-Phe-Phe-Gly-Leu-Arg(NO2)-NH2" represents a peptide, which is a chain of amino acids. In this specific peptide, the amino acids are linked together in the following order: Arginine with a nitro group (Arg(NO2)), Proline, Lysine with a protecting group Z (Lys(Z)), another Proline, two Glutamines (Gln), two Phenylalanines (Phe), Glycine, Leucine, and another Arginine with a nitro group (Arg(NO2)). The sequence ends with an amide group (NH2). This peptide is characterized by the presence of the Z group, which is a protecting group used in peptide synthesis to prevent unwanted side reactions. The nitro groups on the arginines are likely included for specific chemical or biological properties. The sequence is a linear arrangement of these amino acids, which could have potential applications in pharmaceuticals, research, or other fields where specific peptide sequences are required.
The CAS Registry Mumber 82155-80-4 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 0 respectively. Calculate Digit Verification of CAS Registry Number 82155-80: (7*8)+(6*2)+(5*1)+(4*5)+(3*5)+(2*8)+(1*0)=124 124 % 10 = 4 So 82155-80-4 is a valid CAS Registry Number.