S. McQueen-Mason is the first author of the 1992 study that isolated wall-extension-promoting proteins associated with expansin activity. The original paper gives the byline Simon McQueen-Mason. Working with colleagues, S. McQueen-Mason extracted material from growing seedling cell walls and tested whether it could induce extension in isolated walls.[ref]
Two endogenous proteins that induce cell wall extension in plants by S. McQueen-Mason and others. Original first-page byline and Abstract
Separating the extract into active fractions linked the effect to two proteins, each able to promote extension without detectable hydrolytic wall breakdown. Reconstitution made the scientific question sharper: a substance associated with growth was tested for its ability to restore a physical wall response.[ref]
Two endogenous proteins that induce cell wall extension in plants by S. McQueen-Mason and others. Abstract: separated activities and isolated-wall assay
The distinction between extension and hydrolysis is useful beyond this experiment. A wall can change its mechanical behaviour without wholesale digestion of its constituent polysaccharides.
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