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CV Exam 3 Proteins and Genes
Proteins, Genes, and Compounds for CV Exam 3
18
Medical
Professional
10/06/2011

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Cards

Term
CYP450 3A4
Definition
metabolizes amiodarone, flecainide, and digitoxin
Term
Cardiac Troponin I
Definition
>0.1ng/ml abnormal, indicates MI/trauma/surgery/CHF/myocarditis/pulmonary embolism/sepsis
Term
CKMB mass
Definition
>5ng/ml abnormal
Term
NT-pro-BNP
Definition
>100pg/ml abnormal, indicaets CHF/ACS/renal failure/pulmonary embolism/cor pulmonale
Term
NT-pro-BNP
Definition
3x higher than BNP in CHF
Term
T-tubles
Definition
move Ca2+ between fibrils
Term
Tropomyosin
Definition
covers the active site of actin
Term
Troponin T
Definition
binds tropomyosin, moves 30o when activated
Term
Troponin I
Definition
binds actin
Term
Troponin C
Definition
binds Ca2+, allows for contraction when Ca2+ bound
Term
myosin
Definition
heads form cross-bridges with actin, Pi release is rate-limiting step
Term
Connexins
Definition
subunits that compromise ion channels (Cx40>Cx43>Cx45>Cx30.2)
Term
RyR2
Definition
binds Ca2+ and opens Ca2+ channels out of sarcoplasm
Term
SERCA
Definition
Ca2+ channels from cytosol into SR
Term
Calsequestrin
Definition
packs Ca2+ in SR close to RyR2 to facilitate release
Term
Phospholamban
Definition
blocks Ca2+ movement into SR via SERCA
Term
PKA
Definition
inactivates phospholamban, increases internal Ca2+ (downstream of catecholamines)
Term
Na+/Ca2+ Exchangers (CNX)
Definition
decrease intracellular Ca2+
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