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-
- RestrictionEnzymes was written (a long time ago) using Think's
- Lightspeed Pascal by Scott Young (scott@codon.nih.gov) and Alex Hsu at the Laboratory
- of Cellular and Molecular Regulation, National Institute of Mental
- Health, Bethesda, MD 20892.
-
- The application RestricitionEnzymes reads from the text file
- ResEnzFil.Text which contains the restriction enzyme data. This
- file may be altered by SimpleText, or through functions Command
- A(dd) and R(emove), as described below. The file is limited to
- 240 enzymes.
-
-
- After downloading the two files, make sure that there is no suffix after
- ResEnzFil.Text.
-
-
- Note: Copy files to your own disk to run the program efficiently.
- After starting program, wait until the screen refreshes before using
- menu items. Wayne Rasband recently (2/12/97) fixed a bug and recompiled it
- so it should work more smoothly now.
-
-
- RestrictionEnzymes has 6 commands:
-
-
- Command 1: This function searches for restriction sites within the
- sequence produced when two DNA ends generated by restriction
- enzymes are blunted and then ligated. First, the table of restrictions
- enzymes is displayed. Select two enzymes by placing the cursor
- over an enzyme and clicking that enzyme and then selecting either
- the phrase "Restrict both ends with the same enzyme" or another
- enzyme. Change the selections by selecting a different enzyme.
- "Restrict both ends with the same enzyme" refers back to the last
- enzyme selected. To proceed, press any key. If the an enzymethat
- was selected leaves a 5' overhang, then you will be asked whether
- you wish to fill in (e.g, by Klenow) or trim back (e.g, by T4 DNA
- polymerase) to blunt the DNA end. If the enzyme leaves a blunt or a
- 3' overhang, no option is presented. The 3' overhang is trimmed.
-
- Command 2: This function lists the restriction enzymes (if any)
- that produce ends compatible with an end left by the restriction
- enzyme selected from the displayed table.
-
- Command 3: This function lists restriction sites within an inputted
- sequence (limited to 250 bases). The nomenclature of the
- International Union of Biochemistry is listed when this function is
- chosen. No information on position of the sites is given as this
- function is handled by numerous sequence analysis programs.
-
- Command 4: This function displays the list of restriction enzymes
- to which RestrictionEnzymes refers.
-
- Command A: This function allows the user to add a restriction
- enzyme to the reference list in the file ResEnzFil.Text. The function
- can accommodate symmetrical and asymmetrical cutters. Only the
- first 210 enzymes are accessed.
-
- Command R: This function allows the user to remove an enzyme
- from the file ResEnzFil.Text. The selected enzyme from the
- displayed table is deleted.
-
- Command P: This function prints the accumulated results of the
- selected functions.
-
- Command Q: This function ends the run.
-
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