Sulfoquinovosyldiacylglycerol and phosphatidylglycerol bilayers share biophysical properties and are good mutual substitutes in photosynthetic membranes.

[Display omitted] • Phosphatidylglycerol (PG) and sulfoquinovosyldiacylglycerol (SQDG) have similar biophysical properties • Despite different polar head, PG and SQDG are able to substitute to each other in photosynthetic membrane. • SQDG is a good substitute for PG to maintain the chloroplast functional organization and its photosynthesis activity. [ABSTRACT FROM AUTHOR]