Identifying and measuring specific proteins in complex
biological mixtures, such as blood, have long been
important goals in scientific and diagnostic practice.
More recently the identification of abnormal genes in
genomic DNA has become increasingly important in
clinical research and genetic counselling. Blotting
techniques are used to identify unique proteins or
nucleic acid sequences. They have been- developed to
be highly specific and sensitive and have become
important tools in both molecular biology and clinical
research.