Sentences 1–4 are all very similar in length, which makes the beginning of this passage feel choppy. You may want to combine a few sentences to create more variety. Here are a couple possible revisions:

• Several antimicrobial proteins, which are produced in the body, attach to the cell walls of microbes and cause cell death through diverse mechanisms. Chemokines, one type of these antimicrobial proteins, have generally been shown to direct immune cells to sites of infection in a body.
• The body produces several different antimicrobial proteins. These proteins attach to the cell walls of microbes and cause cell death through diverse mechanisms. One type of these proteins, Chemokines, have generally been shown to direct immune cells to sites of infection in a body.

Sentence 7 is a fragment. The easiest solution is to simply combine with sentence 6 by changing the period to a colon or a comma:

• These antimicrobial chemokines may play an important role in innate immune response: not just as chemoattractants but also as active participants in the immune response.
• These antimicrobial chemokines may play an important role in innate immune response, not just as chemoattractants but also as active participants in the immune response.

Sentence 8 is a run-on sentence. You should either separate them with a period or a semicolon:

• The chemokine CCL28 has been shown to have antimicrobial properties (Liu 2010); our lab has also confirmed these findings.
• The chemokine CCL28 has been shown to have antimicrobial properties (Liu 2010). Our lab has also confirmed these findings.

1. This quote uses the following structure: Preposition + great noun + verb + great noun. This parallel structure in conjunction with the repetition of great creates emphasis. Compare the original quote with these two variants that use different adjectives:
   • Compare: With great power comes a lot of responsibility.
   • Compare: With great power comes immense responsibility.
2. This quote is made up of three one-word command sentences. They all start with the letter l as well, which creates further continuity. Compare the original quote with these non-parallel variants:
   • Compare: Living. Go laugh. Don’t hate.
   • Compare: Live. Giggle. Adore.