Credit: CLOUDS HILL IMAGING LTD/SCIENCE PHOTO LIBRARY

Caption: Blood group test results. Close-up footage of blood samples that have been typed into blood groups by being mixed with antibody serum in a laboratory. The samples have been placed onto a spot plate (or reaction plate) and a pipette was used to add antibody serums. There are four human blood types (groups): A, B, AB and O. The antibody serums will react with the antigens in the blood, with the resulting appearance of the blood used to identify the blood group. Type A blood has type A antigens (surface proteins) on its blood cells and anti-B antibodies (proteins that bind to type B antigens) in its serum. Type B blood is the reverse. Mixing type A blood with anti-A serum (first column, first row) causes an agglutination reaction. Type B blood undergoes the same reaction with anti-B serum (second column, second row). AB blood has no antibodies, but has both A and B antigens on its cells, so it agglutinates with both serums (third column). Type O blood has both antibodies but no antigens, so it does not react to the serums (fourth column). For a sequence showing the blood group testing, see clips K006/5135, K006/5130, K006/5137, K006/5161, K006/5185, K006/5132, and K006/5192.

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Blood group test results

K006/5192 Rights Managed

Downloadable master

Duration: 00:00:06.2

Frame size: 768x576

Frame rate: 25

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 44.4M

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Capture format: Betacam SP

Frame size: 720x576

Codec: DV - PAL

Interlaced: Yes

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