I apologize for omitting to mention what COILS does.
COILS is a program for the automated prediction of
coiled-coil segments in proteins. The reference is:
Lupas A, Van Dyke M and Stock J (1991) Predicting
coiled coils from protein sequences, Science 252:1162.
-Andrei Lupas
lupas at vms.biochem.mpg.de