Relative position of the mylohyoid line on dentulous and edentulous mandibles.

For the purpose of studying the relative position of the mylohyoid line, 156 Japanese mandibles (62 dentulous, 94 edentulous) were measured and comparisons made between specimens. Resorption of bone above the level of the mylohyoid line was recognized but no obvious changes were noted below the level of the mylohyoid line, except in rare cases. A straight pattern of the mylohyoid line was observed most frequently, with the segment of the mylohyoid line between the first and second molars being straight.

Apical Golgi localization of N,N'-diacetyllactosediamine synthase, beta4GalNAc-T3, is responsible for LacdiNAc expression on gastric mucosa.

beta1,4-N-acetylgalactosaminyltransferase III (beta4GalNAc-T3), which was recently cloned and identified, exhibits GalNAc transferase activity toward a GlcNAcbeta residue with beta1,4-linkage, forming the N,N'-diacetyllactosediamine, GalNAcbeta1,4GlcNAc (LacdiNAc or LDN). Though LacdiNAc has not been found in the gastric mucosa, a large amount of transcript was detected in our previous study. To increase our knowledge of beta4GalNAc-T3 expression and its product LacdiNAc, we examined the exact localization of beta4GalNAc-T3 in human gastric mucosa using a newly developed antibody, monoclonal antibody (mAb) K1356.