Oxygen equilibrium ofCucumaria miniata hemoglobin and the absence of the Bohr effect

✍ Scribed by Manwell, Clyde

• Publisher: Wiley (John Wiley & Sons)
• Year: 1959
• Tongue: English
• Weight: 454 KB
• Volume: 53
• Category: Article
• ISSN: 0095-9898
• DOI: 10.1002/jcp.1030530108

✦ Synopsis

ONE FIGURE

I n contrast to the remainder of the Echinodermata, in which there is but a single instance of the occurrence of a respiratory pigment (Hyman, '55), hemoglobin occurs in erythrocytes in representatives of at least three of the 5 orders of holothurians : Cucumaria minintn (Crescitelli, '45), C. f rauegzf elcli (Hogben and van der Lingen, '28) and Thyone briareus (Svedberg, '33) in the Dendrochirota ; Paracauclinn chilensis and Molpadin roretxii (Kobayashii, '32) and Cauclinn sp. and Molpadin arenicolu (the author) in the Molpadonia ; and, Stichopus cnlifornicus (Prosser and Judson, '52) in the Aspidochirota. I n the last-named example the hemoglobin is restricted to the blood vessels (lacunar system); however, in Cucusnnria nzimicita and the various molpaclids hemoglobin occurs in the water-vascular system and the blood vessels as well as in the perivisceral coelom. Spectral properties of the hemoglobin from thc blood vessels and the perivisceral coelorn of Parucaudina chilensis are identical (Kobayashii, '32), although the red blood cell count of and the cell types found in these body fluid compartments are different (Kawamoto, '27). Most studies on sea cucumber hemoglobins have been limited to spectral properties.