Why Robertson model was rejected

Unfortunately, though Robertson's electron micrographs of cell membranes were exceptional for their day, they failed to illustrate that many proteins penetrate the membrane bilayer, and since his images were necessarily static views, they gave no indication of the remarkable ability of proteins to diffuse later- ally ...

Unfortunately, though Robertson's electron micrographs of cell membranes were exceptional for their day, they failed to illustrate that many proteins penetrate the membrane bilayer, and since his images were necessarily static views, they gave no indication of the remarkable ability of proteins to diffuse later- ally ...

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products