The chemical sequence "Z(OMe)-Ser(Bzl)-Phe-His-Asp(OChp)-Lys(Z)-Tyr-Gly-Leu-Ala-NH2" represents a peptide, which is a chain of amino acids. In this specific peptide, each three-letter abbreviation corresponds to an amino acid, and the numbers and letters indicate modifications or protective groups. "Z(OMe)" stands for a carbobenzoxy group with a methoxy group, attached to the serine (Ser). "Bzl" indicates a benzyl group on serine. "Phe" is phenylalanine, "His" is histidine, and "Asp(OChp)" is aspartic acid with a chlorophenyl group. "Lys(Z)" is lysine with a benzyloxycarbonyl group, "Tyr" is tyrosine, "Gly" is glycine, "Leu" is leucine, and "Ala" is alanine. The "NH2" at the end signifies the presence of an amine group, indicating the C-terminus of the peptide. This sequence is likely part of a larger protein or a peptide of interest in biological or pharmaceutical research, with the protective groups used to stabilize the peptide during synthesis and protect certain functional groups until they are needed in a later step of the process.
The CAS Registry Mumber 98477-91-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,4,7 and 7 respectively; the second part has 2 digits, 9 and 1 respectively. Calculate Digit Verification of CAS Registry Number 98477-91: (7*9)+(6*8)+(5*4)+(4*7)+(3*7)+(2*9)+(1*1)=199 199 % 10 = 9 So 98477-91-9 is a valid CAS Registry Number.