Problem:
Question 1: Which of the following mechanisms are not known to contribute to the regulation of Src Kinase activity?
a) Tyrosine phosphorylation
b) Lysine methylation
c) Autophosphorylation
d) Ligand binding
Question 2: Polyubiquitilation via K48 linkage is a signal for
a) DNA repair
b) endocytosis
c) exocytosis
d) proteosomal degradation
Please Explain don't just write the answer.