A Non-Coding DNA Sequence Mutation Is Thought to Alter the Expression

A non-coding DNA sequence mutation is thought to alter the expression of the gene coding for a particular fetal enzyme. The fetus and his parents' liver and bone marrow cells are collected. Which of the following is the best approach for determining if this gene is being transcribed in isolated cell cultures?

A) Northern blot
B) Western blot
C) Southern blot
D) Southwestern blot
E) Enzyme-linked immunosorbent assay