"Z(OMe)-His-Ser(Bzl)-Asp(OBzl)-Ala-OBzl" represents a peptide sequence consisting of five amino acids: histidine (His), serine (Ser), aspartic acid (Asp), and alanine (Ala). The sequence is modified with protecting groups to facilitate synthesis and purification. The histidine is protected with a Z(OMe) group, which is a benzyloxycarbonyl (Cbz) group with a methoxyethyl (OMe) substitution. The serine is protected with a benzyl (Bzl) group, while the aspartic acid has an OBzl group, indicating a benzyl ester protecting group on its carboxylic acid side chain. The alanine is not protected, and the peptide is capped with an OBzl group at the C-terminus. This specific sequence and protection scheme are likely used in the synthesis of larger peptides or proteins, where the protecting groups are removed at specific stages to allow for further reactions or folding.
The CAS Registry Mumber 86741-99-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,6,7,4 and 1 respectively; the second part has 2 digits, 9 and 9 respectively. Calculate Digit Verification of CAS Registry Number 86741-99: (7*8)+(6*6)+(5*7)+(4*4)+(3*1)+(2*9)+(1*9)=173 173 % 10 = 3 So 86741-99-3 is a valid CAS Registry Number.