Muscle Protein Flashcards
1
Q
an organelle unique to muscle tissue that is composed of long cylindrical rods
A
myofibril
2
Q
a structural unit of myofibril in striated muscles. Consists of a dark band and pale adjacent bands
A
sarcomere
3
Q
this protein is located in the sarcomere
- is considered the thin filament
- is 6-8 nm in diameter.
- 20% of muscle protein
A
actin
4
Q
- Protein that forms the contractile filaments of the sarcomere.
- considered the thick filament
- held in position by other proteins
A
myosin
5
Q
protein found in the M band of sarcomere
-associated with M-protein
A
myomesin
6
Q
- protein found in the I band
- 7%of muscle protein
- regulates actin ad myosin binding
A
tropomyosin
7
Q
- a calcium binding protein
- found in the I band
- regulates contraction
A
troponin
8
Q
Found in the z line
connects myofibrils together
A
desmin
9
Q
protein that overlaps the A band an the I band
- network of thin filaments
- from z line to M line
- serves as blue print for sarcomere assembly
- 8% of muscle protein
A
titin
10
Q
protein that overlaps A band and I band -only in skeletal muscle -z line to tropomodulin highly modular structure optimizes thin/thick filament overlap
A
nebulin
11
Q
binds actin thin filaments to z disks
A
Cap Z
12
Q
found on the loose ends of actin thin filaments
A
tropomodulin
13
Q
list protein in A band
A
- myosin
- c-protein
- h-protein
- titin
- M band protein
14
Q
Proteins in M line
A
- creatine kinase
- M protein
- Myomesin-1
- Titin
15
Q
Proteins in the I band
A
- Actin
- Tropomyosin
- Troponin
- Vinuclin
- Cap Z and tropomodulin
