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Fig. 2 | Virology Journal

Fig. 2

From: Evaluation of recombinase polymerase amplification for detection of begomoviruses by plant diagnostic clinics

Fig. 2

Comparison of selected treatments on the visualization of RPA-generated amplicons. a Results using primer pair TYL828F/TYL834R from crude extracts prepared in 0.5 N NaOH from Tomato yellow leaf curl virus (TYLCV)-infected tomato leaves and cleaned by heating to 65 °C for 15 min. Lane M: 50 bp ladder MW standard, size is indicated in kilobases (kb); Lane 1 fresh tissue; Lane 2 tissue kept frozen at −20 °C for 5 months; Lane 3 tissue kept frozen at −80 °C for 3 months; Lane 4 desiccated tissue maintained at room temperature for 15 years; Lane 5 non-inoculated tissue kept frozen at −80 °C for 3 months. b Detection of TYLCV from crude extracts prepared in 0.5 N NaOH and cleaned as follows: Lane 1 untreated; Lane 2 QIAquick PCR purification column; Lane 3 heated at 65 °C for 10 min; Lane 4 heated at 95 °C for 10 min; Lane 5 amplicon loading buffer contained 5 % SDS; Lane 6 amplicon loading buffer contained 10 % SDS; Lane 7 amplicon loading buffer contained 5 % formamide; Lane 8 amplicon loading buffer contained 15 % formamide. Ten μl of amplified product were loaded into each lane of the 1.5 % agarose gels and stained with ethidium bromide

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