Abstract
Negatively stained molecules of Sepia officinalis hemocyanin (Hc) (Mr 3.8×106) have the form of a partly hollow cylinder with 350 A diameter and 170 A height. The circular profiles show material inside the cylinder: the so-called collar which has 5-fold (or possibly 10-fold) symmetry (1). At higher pH values this Hc dissociates into five subunits, each consisting of 2×8 domains (a-h) with average Mr of 50,000 (2). Most probably this dissociation is similar to the dissociation of half Helix pomatia α-Hc molecules, i.e. along helical grooves in the cylinder wall (3).
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References:
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© 1986 Springer-Verlag Berlin Heidelberg
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Wichertjes, T., Gielens, C., Schutter, W.G., Préaux, G., Lontie, R., van Bruggen, E.F.J. (1986). Immuno-EM of Sepia officinalis hemocyanin. In: Linzen, B. (eds) Invertebrate Oxygen Carriers. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-71481-8_39
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DOI: https://doi.org/10.1007/978-3-642-71481-8_39
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