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 .
Some breeders use these cutesy, made-up phrases as marketing terms for smaller Yorkshire Terriers. That's all they are -- marketing terms. There is only one Yorkshire Terrier breed, and whether an individual weighs 3 pounds or 6 pounds or 10 pounds, he's still just a Yorkshire Terrier. Some are simply smaller or larger than others. The larger individuals are actually sturdier and often make safer pets. In fact, I do NOT recommend Yorkies under 4 pounds.