메뉴 건너뛰기




Volumn 121, Issue 38, 1999, Pages 8961-8962

Retrieval of DNA using soft-landing after mass analysis by ESI-FTICR for enzymatic manipulation [11]

Author keywords

[No Author keywords available]

Indexed keywords

BIOPOLYMER; DOUBLE STRANDED DNA;

EID: 0033615345     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja9923888     Document Type: Letter
Times cited : (40)

References (35)
  • 29
    • 0345457402 scopus 로고    scopus 로고
    • note
    • 2 pieces, and vortexed in 100 μL PCR buffer (Stratagene, La Jolla, CA). DNA transferred from the membrane into the buffer served as the PCR template. An aliquot of 10 μL buffer was used, with synthetic primers, Pfu DNA polymerase and dNTP, in each PCR amplification, which cycled 40 times (95 °C, 30 s; 54 °C, 30 s; 72 °C, 30 s) in a Perkin-Elmer Thermal Cycler PCR 2400.
  • 32
    • 0344163726 scopus 로고    scopus 로고
    • note
    • 15 were soft-landed at low energy on the membrane. An electrically biased metal grid in front of the membrane prevented unselected species from reaching the surface during ion injection and trapping.
  • 33
    • 0345026271 scopus 로고    scopus 로고
    • note
    • The sequence of the soft-landed single strand DNA is: 5′-ACATCT-TACACATCACCAC TTAAACTGGAATCTTCCCATACATTCAATCC-3′ while the other synthetic DNA in the ESI solution has a G instead of C (at the underlined position). Both DNA and related primers were synthesized in the University of South Carolina oligonucleotide synthesis facility. PCR were carried out using synthetic and commercial reagents (95 °C, 30 s; 46 °C, 30 s; 72 °C, 30 s for 10 cycles, followed by 95 °C, 30 s; 48 °C, 30 s; 72 °C, 30 s for 30 cycles). PCR products were purified and desalted by ethanol precipitation, microdialyzed, and concentrated before analysis by ESI-FTICR.
  • 34
    • 0345026272 scopus 로고    scopus 로고
    • note
    • The amount of one attomole DNA soft-landed was estimated based on the visual relative "spot" intensity on gel electrophoresis (compared to controlled amplification, e.g. Figure 1B). The FTICR cell typically has a charge capacity of 1 million. After 300 cycles of ion injection, manipulation, and soft-landing, tens of millions of ions may be ejected onto the membrane. The cell charge capacity sets an upper limit for the number of soft-landed ions (tens of attomoles) and the experimental results from gel electrophoresis after PCR amplification indicated a maximum of a few percent of ions survived the entire process.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.