"Z-Ile-Leu-Pro-Gln-Ser-Leu-Pro-OBut" is a peptide sequence consisting of eight amino acids, with "Z" representing a carbobenzoxy (Cbz) protecting group, which is commonly used in peptide synthesis to protect the amino group of the first amino acid. The sequence is as follows: Isoleucine (Ile), Leucine (Leu), Proline (Pro), Glutamine (Gln), Serine (Ser), another Leucine (Leu), another Proline (Pro), and a final Leucine (Leu) with a tert-butyl (OBut) protecting group on its carboxylic acid side chain. This specific arrangement of amino acids is not a naturally occurring peptide but rather a synthetic one, potentially designed for research purposes or as a component in a larger biomolecule. The protecting groups are crucial for the stepwise synthesis of peptides, ensuring that each amino acid is added in the correct sequence without unwanted side reactions. Once the peptide is fully synthesized, the protecting groups are removed to reveal the active peptide.
The CAS Registry Mumber 75893-45-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,8,9 and 3 respectively; the second part has 2 digits, 4 and 5 respectively. Calculate Digit Verification of CAS Registry Number 75893-45: (7*7)+(6*5)+(5*8)+(4*9)+(3*3)+(2*4)+(1*5)=177 177 % 10 = 7 So 75893-45-7 is a valid CAS Registry Number.