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a, b and c: Human oocytes at the MII stage. In A the first polar body (PB1) is evident at the 5 o’clock position and in B the PB1 remains on another observational plane. c represents a particular of the CALR staining with the detail of chromosomes with respect to CALR localization. Immunostaining: actin (RED), chromosomes (BLUE) and CALR (GREEN)
