Skip to main content

Table 1 Synthesis protocols

From: Efficiency, error and yield in light-directed maskless synthesis of DNA microarrays

Cycle T

Cycle M (Cy3)

Function

Mode

pulse

sec

Description

Function

Mode

pulses

sec

Description

$Coupling

    

$Coupling

    

1/*Wsh

*/PULSE

20

0

"Flush system with Wsh"

1/*Wsh

*/PULSE

20

0

"Flush system with Wsh"

2/*Act

*/PULSE

6

0

"Act"

2/*Act

*/PULSE

6

0

"Act"

21/*T + Act

*/PULSE

5

0

"T + Act"

25/*8 + Act

*/PULSE

5

0

"8 + Act"

2/*Act

*/PULSE

8

0

"Chase with Act"

2/*Act

*/PULSE

8

0

"Chase with Act"

1/*Wsh

*/PULSE

3

60

"Couple monomer"

1/*Wsh

*/PULSE

3

300

"Couple monomer"

1/*Wsh

*/PULSE

10

0

"Flush system with Wsh"

1/*Wsh

*/PULSE

20

0

"Flush system with Wsh"

$Capping

    

1/*Wsh

*/PULSE

10

0

"Flush system with Wsh"

13/*Caps

*/PULSE

10

0

"Caps"

2/*Act

*/PULSE

6

0

"Act"

13/*Caps

*/PULSE

10

120

"Caps"

25/*8 + Act

*/PULSE

5

0

"8 + Act"

12/*Wsh A

*/PULSE

25

60

"Wsh A"

2/*Act

*/PULSE

8

0

"Chase with Act"

12/*Wsh A

*/PULSE

30

0

"Wsh A"

1/*Wsh

*/PULSE

3

300

"Couple monomer"

40/*Gas A

*/PULSE

1

30

"Dry column"

1/*Wsh

*/PULSE

10

0

"Flush system with Wsh"

$Oxidizing

    

$Oxidizing

    

15/*Ox

*/PULSE

30

0

"Oxidize"

15/*Ox

*/PULSE

30

0

"Oxidize"

12/*Wsh A

*/PULSE

45

0

"Flush system with Wsh A"

12/*Wsh A

*/PULSE

300

0

"Wsh A"

17/*Aux

*/PULSE

45

0

"Aux"

12/*Wsh A

*/PULSE

300

300

"Wsh A"

130/*Event 2 Out

*/NA

4

3

"Event 2 Out"

     

17/*Aux

*/PULSE

16

60

"Aux"

     

12/*Wsh A

*/PULSE

25

0

"Flush system with Wsh A"

     
  1. Generic chemical synthesis protocol (Expedite 8909) for NPPOC-dT coupling (representative of all four bases) and for the terminal label coupling. The 5'-NPPOC light-deprotection step takes place during the "Event Out". During the light exposure, NPPOC removal is aided by washing with exposure solvent from the "Auxiliary" port. If no capping is used, only the Gas A step is retained under the $Capping heading. The oxidation step (15/*Ox) is often omitted for DNA phosphoramidite couplings.