In heme synthesis in mammalian cells: 1. uroporphyrin III is the immediate precursor of coproporhyrin III. 2. delta-aminolevulinic acid is formed by the condensation of succinyl CoA and valine. 3. ferric iron is inserted into protoporphyrin IX prior to attachment to the globin molecule.
If the linear function f is given, the linear equation of the graph of this function is obtained by defining the variable y to be the functional value f(x), that is, setting y = f(x) = ax + b and suppressing the functional notation in the middle.
And look what kind of line it is; it is a straight line! If you are given a linear function, there are two ways to work with it. You can use algebra and calculate your answers or you can graph the function and use the graph to get your answer. Look at the graph above for the function y = 2x.