Confluent HFF cultures on glass coverslips were infected with parasites for the indicated times and under specified growth conditions. Monolayers were fixed, permeabilized, and incubated with antibody as previously described (51 (link)). The following primary antibodies were used: rat monoclonal α-HA (clone 3F10; Roche Applied Sciences), rabbit α-Myc (clone 71D10; Cell Signaling Technology), mouse α-Centrin (clone 20H5; Millipore Sigma), mouse α-CenH3 (centromere marker; kindly provided by Boris Striepen, University of Pennsylvania, Philadelphia, PA), mouse α-Ndc80 (outer kinetochore marker; kindly provided by Marc-Jan Gubbels, Boston College, MA), rabbit α-MORN1 (centrocone and basal complex stains; kindly provided by Marc-Jan Gubbels, Boston College, MA), and rabbit and mouse α-IMC1 (parasite shape and internal daughter bud strains; kindly provided by Gary Ward, University of Vermont, VT). All Alexa-conjugated secondary antibodies (Molecular Probes, Life Technologies) were used at a dilution of 1:500. Coverslips were mounted with Aquamount (Thermo Scientific), dried overnight at 4°C, and viewed on a Zeiss Axiovert microscope equipped with a 100× objective using the ApoTome slicer. The collected images were processed first using Zeiss Zen software and then in Adobe Photoshop 2020 using linear adjustment when needed.
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