The T4 phage is the main source of this enzyme used in the lab.
Weiss units quantify the activity of this protein. Scr7   inhibits this enzyme during CRISPR  ("crisper") gene editing to prevent NHEJ. During standard molecular cloning, this enzyme is added after the phosphatase reaction, immediately before the construct is transformed. The T4 phage is the main source of this enzyme used in the lab. This enzyme can be inefficient when presented with blunt ends, but normally, it rejoins the (*)  sticky ends generated by restriction enzymes. Nucleotide excision repair enzymes express a form of this protein that is also used to fill in double-strand breaks. During replication of the lagging strand, it forms phosphodiester bonds between the short RNA templates and Okazaki fragments. For 10 points, name this enzyme that stitches together DNA.
Weiss units quantify the activity of this protein. Scr7   inhibits this enzyme during CRISPR  
DNA  ligase  [or E.C.  6.5.1.1 ]