( Steroids ( ( ( differ ( from ( most ( other lipids ) ) ) ) ( by ( virtue ( of ( ( the structure ) ( of ( steroids ( consisting ( of ( ( carbon rings ) ( instead ( of chains ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Steroids)) (VP (VBP differ) (PP (IN from) (NP (JJS most) (JJ other) (NNS lipids))) (PP (IN by) (NP (NP (NN virtue)) (PP (IN of) (NP (NP (DT the) (NN structure)) (PP (IN of) (NP (NP (NNS steroids)) (VP (VBG consisting) (PP (IN of) (NP (NP (NN carbon) (NNS rings)) (PP (RB instead) (IN of) (NP (NNS chains))))))))))))) (. .)))
Steroids differ from most other lipids by virtue of the structure of steroids consisting of carbon rings instead of chains.
(ROOT (S (NP (NNS Lipids)) (VP (VBP are) (VP (VBN made) (PP (IN of) (NP (NP (JJ long) (NNS chains)) (VP (VBG consisting) (NP (NP (RB almost) (RB solely)) (PP (IN of) (NP (NN carbon) (CC and) (NN hydrogen))))))))) (. .)))