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138228-90-7

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138228-90-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138228-90-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,2,2 and 8 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 138228-90:
(8*1)+(7*3)+(6*8)+(5*2)+(4*2)+(3*8)+(2*9)+(1*0)=137
137 % 10 = 7
So 138228-90-7 is a valid CAS Registry Number.

138228-90-7Relevant articles and documents

Practical Peptide Synthesis Mediated by a Recyclable Hypervalent Iodine Reagent and Tris(4-methoxyphenyl)phosphine

Zhang, Chi,Liu, Shan-Shan,Sun, Bo,Tian, Jun

supporting information, p. 4106 - 4109 (2015/09/01)

6-(3,5-Bis(trifluoromethyl)phenyl)-1H,4H-2aλ3-ioda-2,3-dioxacyclopenta[hi]indene-1,4-dione (p-BTFP-iodosodilactone, 1a) was synthesized and demonstrated to be an efficient hypervalent iodine(III) reagent for the synthesis of dipeptides from various standard amino acids, including sterically hindered amino acids, in good to high yields within 30 min in the presence of tris(4-methoxyphenyl)phosphine. In addition, the combined system of 1a/(4-MeOC6H4)3P was used to synthesize the pentapeptide leu-enkephalin in protected form. It is worth noting that 1a can be regenerated readily after reaction.

Influence of solvent viscosity on the rate of hydrolysis of dipeptides by carboxypeptidase Y

Kanosue, Yoshifumi,Kojima, Satoshi,Ohkata, Katsuo

, p. 448 - 457 (2007/10/03)

The influence of solvent viscosity on the rate of enzymatic hydrolysis of a series of dipeptides (Z-Phe-Gly, Z-Phe-Sar, Z-Phe-Ala, Z-Phe-NMeAla, Z-Phe-Aib and Z-Phe-Pro) by carboxypeptidase Y was investigated. The effect of solvent viscosity on the enzymatic hydrolysis revealed that whereas all Kcat values decreased with viscosity, those of the N-alkyl peptides decreased more than those of the N-H peptides. The kinetic behaviour implies the involvement of conformational changes of the enzyme in terms of the 'induced-fit' process. Copyright

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