Question about Hydrogen Bonds?

"ana78casta" <[email protected]> Wed, 24 Apr 2002 23:07:03 -0000
Newsgroups gmane.science.biology.folding-at-home
Message-ID <[email protected]>
During folding hydrogen bonds occur everytime a hydrogen atom 
covalently bonds to or touches either a F, O, or N atom.  Is it true 
that it also must have lone pairs of electrons?  Could someoneplease 
explain that for me.  Thanks.

--Anna Casta