 Two endogenous proteins that induce cell wall extension in plants by S. McQueen-Mason and others

Plant Cell 4, 1425–1433 (1992), DOI 10.1105/tpc.4.11.1425. Abstract and primary paper academic.oup.com/plcell/article-pdf/4/11/1425/34745719/plcell_v4_11_1425.pdf : wall-extract reconstitution, fractionated 29/30-kDa activities, extension without detectable hydrolytic breakdown. PubMed duplicates the final author in its indexed byline; original paper has three authors.