"Z-HyiV-D-HyiV-UtBu" refers to a specific sequence of amino acids and chemical modifications. In this sequence, "Z" stands for a carbobenzoxy group, which is a protecting group used in peptide synthesis to prevent unwanted side reactions. "HyiV" represents a hydroxyisoleucine, an amino acid with a hydroxyl group attached to the side chain. "D" is the abbreviation for aspartic acid, an acidic amino acid. The sequence continues with another "HyiV" and ends with "UtBu," which indicates a tert-butyl group attached to the carboxylic acid group, serving as a protecting group. This particular sequence is likely used in the synthesis of peptides or proteins with specific properties, where the protecting groups are crucial for controlling the reaction conditions and ensuring the correct formation of peptide bonds. The final product, once all protecting groups are removed, would be a peptide with unique biochemical properties due to the presence of the modified amino acids.
The CAS Registry Mumber 39552-45-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,9,5,5 and 2 respectively; the second part has 2 digits, 4 and 5 respectively. Calculate Digit Verification of CAS Registry Number 39552-45: (7*3)+(6*9)+(5*5)+(4*5)+(3*2)+(2*4)+(1*5)=139 139 % 10 = 9 So 39552-45-9 is a valid CAS Registry Number.