Thank you, that solved the problem, but only partly I'm afraid. Problem is that the lines need to be formatted in a certain way, so that one line looks exactly like this: ATOM 1 N ALA 1 41.744 64.901 30.842 1.00 47.38 2CDV 83

Is there a way to combine the code below with format specifiers to produce the above text?

Cheers
/Per


As always, TMTOWTDI:

you can remove the newlines from every field and print it plus a
space, and only print newlines before printing the ATOM field
(remember to put the extra print at the end)

while (<>) {
   chomp;
   print "\n" if /^ATOM/ and $. !=  1;
   print "$_ ";
}
print "\n";

I am certain other people could come up with different solutions.



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