Distinct molecules called agglutinogens (a type of antigen) are attached to the surface of red blood cells. There are two different types of agglutinogens, type A and type B. Each type has different properties.
MDB: Geodatabase. The geodatabase is a collection of geographic datasets of various types, with the most basic types being vector, raster, and tabular data. There are three types of geodatabases: file, personal, and ArcSDE. Geodatabases are the native data format for ESRI's ArcGIS.
ArcGIS for Desktop has tools for converting KML to an ArcGIS data format, so you can view, edit, and analyze the geographic data contained in any KML file. There are also tools for creating KML, so you can convert any of your data or maps into a KML file that can be easily shared.