G protein is referred to: ()
A. PKA
B. guanylate cyclase
C. PKG
D. GRB2 binding protein
E. Guanylate binding protein
Which of the following play an important role in maintaining the structure of antiparallel β-pleated sheet? ()
A. hydrogen bond between the amino acid side chain
B. electrostatic attraction
C. disulfide bond
D. peptide bond
E. Vander Waa1s
Which of the following could keep the colloidal nature of protein? ()
A. the protein solution have more stronger consistency
B. electric charge surround the colloid
C. water membrane
D. the protein solution is true solution
E. electric charge surround the colloid and water membrane
The average nitrogen content of protein is: ()
A. 0.1
B. 0.12
C. 0.14
D. 0.16
E. 0.18
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