Complex sentence: It was here that she studied the activity of enzymes and enzyme kinetics, more specifically she focused on hexitol dehydrogenases from several bacteria, including "Bacillus subtilis" and "Aerobacta aerogenes".
Split into simpler sentences: It was here that she studied the activity of enzymes and enzyme kinetics. More specifically, she focused on hexitol dehydrogenases from several bacteria, including "Bacillus subtilis" and "Aerobacta aerogenes".