The characteristic of good a reporter protein is that it should be easy to assay or detect and is not present normally in the test system. Selection of the reporter system also depends on the experimental system, sensitivity needs and the available detection strategy, be it absorbance, fluorescence or bioluminescence.
1 Included among these breeds are the English Toy Terrier and the Yorkshire Terrier. 2  While small, they retain true terrier character and are not submissive  lap dogs 3  . Bull type Terriers: The Bull and Terrier types were originally combinations of bulldogs and terriers as general mixed breed bull-baiting and pit dogs. Toy terriers: Bred down from larger terriers, these terriers are shown in the Toy or Companion group. 2  Included among these breeds are the English Toy Terrier and the Yorkshire Terrier. 3  While small, they retain true terrier character and are not submissive  lap dogs .
History. This Scottish native terrier started out hunting rodents, including badgers and foxes. Historical references to this type of terrier date back to at least the 1600s. Originally called the Poltalloch terrier, the breed made its initial appearances at dog shows in the early 20th century.ppearance. If you're thinking of bringing a Westie into your life, you'll have a small but active companion. At maturity, Westies weigh between 15 and 21 pounds, standing 10 to 11 inches high at the shoulder. As his name states, his coat is snow white, but his dark, shoe-button eyes equally add to his appeal.