Human embryonic stem cell colonies that have been stained for alkaline phosphatase (red). Alkaline phosphatase staining is used to show that the colonies are pluripotent. The colonies are growing on a...

Scanning electron micrograph of red blood cells clearly showing their biconcave disc shape. Human red blood cells are typically 8 microns x 2 microns in size.

Confocal micrograph of astrocytes and oligodendrocytes from neural stem cells Astrocytes (green) and oligodendrocytes (red) derived from rat neural stem cells in culture. Both these cells are types of...

Scanning electron micrograph illustrating bacteria contamination of cells.

Immortalized human schwannoma HEI-193 cells (House Ear Institute) from a Neurofibromatosis Type 2 (NF2) patient (Hung et al., 1993) imaged with orientation independent differential interference contra...

Cultured retinal pigment epithelial cell were stably transfected with mCherry-clathrin light chain and EGFP-epsin. Live-cell time lapse images were collected on a Nikon TiE TIRF with a 100x1.49 NA ob...

Scanning electron micrograph showing in vitro fertilization of a hamster oocyte. The sperm head, near the center of the field of view, is engulfed by the microvilli on the surface of the oocyte membr...

Scanning electron micrograph showing a lateral view of sperm penetration of a hamster oocyte during vitro fertilization. As the membrane of the sperm head fuses with that of the oocyte, the microvill...

Cultured retinal pigment epithelial cell were stably transfected with mCherry-clathrin light chain and EGFP-epsin. Live-cell time lapse images were collected on a Nikon TiE TIRF with a 100x1.49 NA ob...

Scanning electron micrograph montage of cultured HeLa cells. This image is a montage of six overlapping fields of view, each photographed at 2,231x with a 17.8mm working distance and an accelerating v...