Ishijima S, Baba S, Mohri H, Suarez S. Quantitative analysis of flagellar movement in hyperactivated and acrosome-reacted golden hamster spermatozoa. Mol Reprod Dev. 2002;61:376-84 pubmed
..These results suggest that both extreme pro- and anti-hook bends are essential in the acrosome-reacted spermatozoa even though beat frequency decreased markedly. ..
Ishijima S. Digital image analysis of flagellar beating and microtubule sliding of activated and hyperactivated sperm flagella. Soc Reprod Fertil Suppl. 2007;65:327-30 pubmed
Ishijima S. The velocity of microtubule sliding: its stability and load dependency. Cell Motil Cytoskeleton. 2007;64:809-13 pubmed
..Data from sea urchin spermatozoa also satisfied the equation, suggesting that the same microtubule sliding system functions in both the mammalian and echinoderm spermatozoa. ..
Ishijima S. Mechanical constraint converts planar waves into helices on tunicate and sea urchin sperm flagella. Cell Struct Funct. 2012;37:13-9 pubmed
Ishijima S. Regulations of microtubule sliding by Ca2+ and cAMP and their roles in forming flagellar waveforms. Cell Struct Funct. 2013;38:89-95 pubmed
..cAMP enhanced the three-dimensionality of the flagellar waves at a low Ca(2+). These changes in the flagellar waves were caused by different regulations of the microtubule sliding by calcium, cAMP, and MgATP(2-)...