Abstract
1. 1. The transverse distribution of 1-palmitoyl-sn-glycero-3-phospho-N-[Me-13C]-choline in vitro incorporated in sarcoplasmic reticulum has been measured by means of 13C NMR and DyCl3 as an impermeable shift reagent.
2. 2. Lysophosphatidylcholine added to the membranes equilibrates within 30 min at 20°C between outer and inner membrane leaflet so that 42% is
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