Villafruela, M J Molecular forms of acetylcholinesterase in the chick visual system. Collagenase-released 21.5 S and 16.5 S species. [electronic resource] - FEBS letters Jan 1980 - 91-5 p. digital Publication Type: Journal Article ISSN: 0014-5793 Standard No.: 10.1016/0014-5793(80)80031-7 doi Subjects--Topical Terms: Acetylcholinesterase--metabolismAnimalsCentrifugation, Density GradientChickensMacromolecular SubstancesMicrobial CollagenasePeptide Fragments--metabolismPronaseRetina--enzymologyTectum Mesencephali--enzymology