Complex sentence: Victor P. Whittaker (11 June 1919--5 July 2016) was a British biochemist who pioneered studies on the subcellular fractionation of the brain by isolating synaptosomes and synaptic vesicles from mammalian brain and demonstrating that synaptic vesicles store the neurotransmitter acetylcholine.
Split into simpler sentences: Victor P. Whittaker (11 June 1919--5 July 2016) was a British biochemist who pioneered studies on the subcellular fractionation of the brain. He did this by isolating synaptosomes and synaptic vesicles from mammalian brain and demonstrating that synaptic vesicles store the neurotransmitter acetylcholine.