sub:provenance {
  beldoc: dce:description "Approximately 61,000 statements." ;
    dce:rights "Copyright (c) 2011-2012, Selventa. All rights reserved." ;
    dce:title "BEL Framework Large Corpus Document" ;
    pav:authoredBy sub:_6 ;
    pav:version "1.4" .
  sub:_5 prov:value "Within the cardiac isoform's amino-terminal extension, serines are present at residues 23 and 24 (Ser23/Ser24), which serve as substrates for protein kinase A (PKA), which is activated in response to ?-adrenergic stimulation of the heart (3). Several investigations report that PKA-mediated phosphorylation of cTnI results in a reduction in myofilament Ca2+ sensitivity (4), an increase in cross-bridge cycling (5), and increased binding of cTnI to the thin filament. Cardiac TnI is also a substrate for protein kinase C (PKC) phosphorylation at Ser43/Ser45 and Thr144 (position 143 in the human protein) (6). However, the substrate specificity of these sites is not absolute, since PKC can phosphorylate the PKA sites (7-9). " ;
    prov:wasQuotedFrom pubmed:15507454 .
  sub:_6 rdfs:label "Selventa" .
  sub:assertion prov:hadPrimarySource pubmed:15507454 ;
    prov:wasDerivedFrom beldoc: , sub:_5 .
}