Stylistically, results can be organized in a variety of ways, and you should employ subheadings as needed. If there is only a single protocol on a non-human subjects with no control group, there may be no need for subdivisions in the results section. If there are multiple trials or multiple groups, then subheadings should be used to label what is being discussed. The organization of results most commonly "matches" the research question -- groups or trials should be indicated in the last paragraph of the introduction and evident in the results section.
You may want to identify certain types of equipment by vendor name and brand or category (., ultracentrifuge vs. prep centrifuge), particularly if they are not commonly found in most labs. It is appropriate to report, parenthetically, the source (vendor) and catalog number for reagents used, ., " ....poly-L-lysine (Sigma #1309) ." When using a method described in another published source, you can save time and words by providing the relevant citation to the source. Always make sure to describe any modifications you have made of a standard or published method.