neutral glycine in CHARMM ?



 Dear netters,
 This is to ask how to build neutral glycine in CHARMM, it means
 NH2-CH2-COOH. We are working with CHARMM 23 and only zwitterion of
 glycine is present there.
 Many thanks in advance
 Petr Belsky
 belsky-: at :-indy.jh-inst.cas.cz