The model consists of 106 species and 192 reactions. Model inputs and outputs are shown in gray. This model focused on neonatal rat ventricular myocytes for initial implementation using a normalized-Hill differential equation approach [2]. Fifty-two transgenic mouse models representing 34 of the species were identified in the literature for this analysis (red mice, see supplemental Table S5). ISO, isoproterenol; NE, norepinephrine; ET1, endothelin-1; IGF1, insulin-like growth factor 1; AngII, angiotensin II; NGR1, neuregulin 1; IL6, interleukin 6; FGF, fibroblast growth factor; CT1, cardiotropin 1; BNP, brain natriuretic peptide; ANP, atrial natriuretic peptide; SERCA, sarcoplasmic reticulum ATPase; α-MHC, α- myosin heavy chain; sACT, skeletal α-actin; CREB, cAMP-responsive element-binding protein; EGFR, EGF receptor; FGFR, FGF receptor; IP3, inositol 1,4,5-trisphosphate; β-AR, β-adrenergic receptor; α-AR, α-adrenergic receptor; NOS, nitric oxide synthase; NIK, NFκB-inducing kinase; AC, adenylyl cyclase; DAG, diacylglycerol; PLC, phospholipase C; FAK, focal adhesion kinase; SRF, serum response factor; GCA, guanylyl cyclase subtype A.