program to combine omit maps?

[HEFFRON at UCRAC1.UCR.EDU]

Does anyone know of a program or procedure to combine several omit maps, each
omitting a different region, into one big map?  (We usually calculate maps with
X-PLOR, then make dsn6 files for O with a version of Mappage.)

                                 Thanks,
                                 Susan Heffron

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Biochemistry Dept.                       phone:    (909) 787-4196
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