Tanaka-Kunishima, Motoko, Ishida, Yoshihiro, Takahashi, Kunitaro, Honda, Motoo, Oonuma, Takashi
Abstract Background In spite of the recent accumulation of genomic data, the evolutionary pathway in the individual genes of present-day living taxa is still elusive for most genes. Among ion...
BMC Evolutionary Biology BioMed Central (2007)
Motoko Tanaka-kunishima, Yoshihiro Ishida, Kunitaro Takahashi, Takashi Oonuma
Research article Ancient intron insertion sites and palindromic genomic duplication evolutionally shapes an elementally functioning membrane protein family
Changes in holding and ion-channel currents during activation of an ascidian egg under voltage clamp
Kozuka, Masao, Takahashi, Kunitaro
1. The unfertilized egg of an ascidian, Halocynthia roretzi, was activated by the divalent ionophore A23187 in natural or artificial sea water (nSW or ASW) or by an external solution containing a...
Electrical excitability in the egg cell membrane of the tunicate
Miyazaki, Shun-Ichi, Takahashi, Kunitaro, Tsuda, Kazuko
1. With the purpose of studying the differentiation of an excitable membrane, the electrical properties of the tunicate egg, a mosaic egg, was examined by intracellular recording techniques. The...
Analysis of non-linearity observed in the current—voltage relation of the tunicate embryo
Miyazaki, Shun-Ichi, Takahashi, Kunitaro, Tsuda, Kazuko, Yoshii, Mitsunobu
1. In the gastrula of the tunicate (Halocynthia aurantium) the resting potential of the embryonic membrane was about -70 mV in both std ASW and Na-free ASW.
Hagiwara, Susumu, Takahashi, Kunitaro
1. Properties of anion permeation through the membrane of skeletal muscle fibres of the stingray, Taeniura lymma, were studied with intracellular recording and polarization techniques.
Hagiwara, Susumu, Hayashi, Hideo, Takahashi, Kunitaro
1. The behaviour of membrane currents in a giant muscle fibre of a certain barnacle Balanus nubilus, Darwin, was studied by using voltage clamp technique after treating fibres with a Ca-chelating...
Resting and spike potentials of skeletal muscle fibres of salt water elasmobranch and teleost fish
Hagiwara, Susumu, Takahashi, Kunitaro
1. Membrane properties of the muscle fibre were studied in twitch motor system of sea-water elasmobranch (Taeniura lymma, Himantura uarnak and Pastinachus sephen) and teleost fish (Periophthalmodon...
Changes in holding and ion-channel currents during activation of an ascidian egg under voltage clamp
Kozuka, Masao, Takahashi, Kunitaro
1. The unfertilized egg of an ascidian, Halocynthia roretzi, was activated by the divalent ionophore A23187 in natural or artificial sea water (nSW or ASW) or by an external solution containing a...
Electrical excitability in the egg cell membrane of the tunicate
Miyazaki, Shun-Ichi, Takahashi, Kunitaro, Tsuda, Kazuko
1. With the purpose of studying the differentiation of an excitable membrane, the electrical properties of the tunicate egg, a mosaic egg, was examined by intracellular recording techniques. The...
Analysis of non-linearity observed in the current—voltage relation of the tunicate embryo
Miyazaki, Shun-Ichi, Takahashi, Kunitaro, Tsuda, Kazuko, Yoshii, Mitsunobu
1. In the gastrula of the tunicate (Halocynthia aurantium) the resting potential of the embryonic membrane was about -70 mV in both std ASW and Na-free ASW.
Hagiwara, Susumu, Takahashi, Kunitaro
1. Properties of anion permeation through the membrane of skeletal muscle fibres of the stingray, Taeniura lymma, were studied with intracellular recording and polarization techniques.
Hagiwara, Susumu, Hayashi, Hideo, Takahashi, Kunitaro
1. The behaviour of membrane currents in a giant muscle fibre of a certain barnacle Balanus nubilus, Darwin, was studied by using voltage clamp technique after treating fibres with a Ca-chelating...
Resting and spike potentials of skeletal muscle fibres of salt water elasmobranch and teleost fish
Hagiwara, Susumu, Takahashi, Kunitaro
1. Membrane properties of the muscle fibre were studied in twitch motor system of sea-water elasmobranch (Taeniura lymma, Himantura uarnak and Pastinachus sephen) and teleost fish (Periophthalmodon...
Inazawa, Takeshi, Okamura, Yasushi, Takahashi, Kunitaro
Cleavage-arrested anterior animal (a4-2) blastomeres isolated from eight-cell embryos of Halocynthia aurantium differentiated into neuronal type cells expressing neuron-specific ion channels when...
Tanaka-Kunishima, Motoko, Takahashi, Kunitaro
During early ascidian development, which is a prototype of early vertebrate development, anterior neuroectoderm cells (a4.2) from the eight-cell embryo are destined to become anterior neural...
Surface Density of Calcium Ions and Calcium Spikes in the Barnacle Muscle Fiber Membrane
Hagiwara, Susumu, Takahashi, Kunitaro
The effects of various divalent cations in the external solution upon the Ca spike of the barnacle muscle fiber membrane were studied using intracellular recording and polarizing techniques. Analysis...