( ( ( Krebs Cycle ) ( If ( oxygen ( is ( available ( to ( support ( aerobic respiration ) ) ) ) ) ) ) ) ( , ( reactions ( ( occur ( subsequent ( to ( glycolysis ( within ( ( the mitochondrion ) ( -LRB- ( ( especially ( associated ( with ( the ( inner ( mitochondrial membrane ) ) ) ) ) ) -RRB- ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (NP (NNP Krebs) (NNP Cycle)) (IN If) (S (NP (NN oxygen)) (VP (VBZ is) (ADJP (JJ available) (S (VP (TO to) (VP (VB support) (NP (JJ aerobic) (NN respiration))))))))) (, ,) (NP (NNS reactions)) (VP (VBP occur) (ADJP (JJ subsequent) (PP (TO to) (NP (NP (NNS glycolysis)) (PP (IN within) (NP (NP (DT the) (NN mitochondrion)) (PRN (-LRB- -LRB-) (VP (ADVP (RB especially)) (VBN associated) (PP (IN with) (NP (DT the) (JJ inner) (JJ mitochondrial) (NN membrane)))) (-RRB- -RRB-)))))))) (. .)))
Krebs Cycle If oxygen is available to support aerobic respiration, reactions occur subsequent to glycolysis within the mitochondrion (especially associated with the inner mitochondrial membrane).
(ROOT (S (NP (NP (DT The) (NN structure)) (PP (IN of) (NP (NN mitochondrion)))) (VP (VBZ plays) (NP (NP (DT an) (JJ important) (NN role)) (PP (IN in) (NP (JJ aerobic) (NN respiration))))) (. .)))