The chemical "Z(OMe)-Ala-Val-Lys-(Z)-Lys(Z)-Tyr-Leu-Asn-Ser-Ile-Leu-Asn-NH2" is a peptide sequence consisting of 14 amino acids. It begins with Z(OMe)-Ala, which is an N-protected alanine, and continues with a series of other amino acids including valine, lysine, tyrosine, leucine, asparagine, serine, isoleucine, and another lysine. The peptide is capped with an amide group at the C-terminus, indicated by the NH2. The presence of the Z group, which is a benzyloxycarbonyl protecting group, on certain lysine and tyrosine residues suggests that this peptide is designed for specific chemical or biological purposes, such as protecting certain functional groups during synthesis or to prevent unwanted side reactions. This peptide sequence could be part of a larger protein or used in pharmaceutical or research applications due to its specific sequence and protective groups.
The CAS Registry Mumber 75720-39-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,7,2 and 0 respectively; the second part has 2 digits, 3 and 9 respectively. Calculate Digit Verification of CAS Registry Number 75720-39: (7*7)+(6*5)+(5*7)+(4*2)+(3*0)+(2*3)+(1*9)=137 137 % 10 = 7 So 75720-39-7 is a valid CAS Registry Number.