Backbone-surrogate-containing olgomerc compounds and compositions for use in gene modulation

(60) Continuation-in-part of application No. 10/634,483, filed on Aug. 5, 2003. Continuation-in-part of application No. 10/078,949, filed on Feb. 20, 2002, which is a continuation of application No. 09/479,783, filed on Jan. 7, 2000, which is a division of application No. 08/870,608, filed on Jun. 6, 1997, now Pat. No. 6,107,094, which is a continuation-in-part of application No. 08/659, 440, filed on Jun. 6, 1996, now Pat. No. 5,898,031.