endo-alpha-N-acetylgalactosaminidase; endo-alpha-acetylgalactosaminidase; endo-alpha-N-acetyl-D-galactosaminidase; mucinaminylserine mucinaminidase; D-galactosyl-3-(N-acetyl-alpha-D-galactosaminyl)-L-serine mucinaminohydrolase; endo-alpha-GalNAc-ase • • •