O-acetylation of Arabidopsis hemicellulose xyloglucan requires AXY4 or AXY4L, proteins with a TBL and DUF231 domain. - Gille S; de Souza A; Xiong G; Benz M; Cheng K; Schultink A; Reca IB; Pauly M (The Plant cell, 2011)