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1269759-81-0

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1269759-81-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1269759-81-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,6,9,7,5 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1269759-81:
(9*1)+(8*2)+(7*6)+(6*9)+(5*7)+(4*5)+(3*9)+(2*8)+(1*1)=220
220 % 10 = 0
So 1269759-81-0 is a valid CAS Registry Number.

1269759-81-0Relevant articles and documents

Aminomethylene peptide nucleic acid (am -PNA): Synthesis, regio-/stereospecific DNA binding, and differential cell uptake of (α/γ, R / S) am- PNA analogues

Mitra, Roopa,Ganesh, Krishna N.

, p. 5696 - 5704 (2012/08/07)

Inherently chiral, cationic am-PNAs having pendant aminomethylene groups at α(R/S) or γ(S) sites on PNA backbone have been synthesized. The modified PNAs are shown to stabilize duplexes with complementary cDNA in a regio- and stereo-preferred manner with γ(S)-am PNA superior to α(R/S)-am PNAs and α(R)-am PNA better than the α(S) isomer. The enhanced stabilization of am-PNA:DNA duplexes is accompanied by a greater discrimination of mismatched bases. This seems to be a combined result of both electrostatic interactions and conformational preorganization of backbone favoring the cDNA binding. The am-PNAs are demonstrated to effectively traverse the cell membrane, localize in the nucleus of HeLa cells, and exhibit low toxicity to cells.

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