You ran a gel using SDS-PAGE. Total molecular mass of your unknown protein (determined via gel filtration): 217 kDa Standard curve equation based on your protein ladder: 5205.6x^(-1.22) Number of bands in your unknown protein sample: 3 Distance each band traveled on your gel: A measured at 20 mm B measured at 62 mm C measured at 82 mm What is the molecular weight of subunit C? 24 kDa 29 kDa 34 kDa 43 kDa 135 kDa 145 kDa

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Scientific Notation

We have to deal with quantities that are extremely large or very small. For example- I may have 6,500,000,000 red blood cells, or the diameter of an iron atom is 0.000000011 inches. Numbers with many zeros can be inexpedient to work with, so scientists use scientific notation. It represents very large numbers or very small numbers in a simple form. We know that whole numbers can be extended to infinity, but we cannot write such large numbers on paper. Numbers that present in millions of places after the decimal point need to be represented simply. Thus, it is difficult to represent a few numbers in their extended form. Therefore, we use scientific notation.