A chalazion is caused by the oil in the gland becoming too thick to flow out of the gland or the opening of the gland being obstructed. Without anywhere to go, the oil builds up inside the gland and forms a lump in the eyelid.ach of the oil glands, called meibomian glands, produces oil that flows out of the gland into the tears. The oil exits from each gland through a tiny circular opening just behind the eyelashes of the upper and lower lids of both eyes.
Transcription activator-like effector nucleases (TALENs) are artificial restriction enzymes generated by fusing a TAL effector DNA-binding domain to a DNA cleavage domain.Restriction enzymes are enzymes that cut DNA strands at a specific sequence.rom Wikipedia, the free encyclopedia. Transcription activator-like effector nucleases (TALENs) are artificial restriction enzymes generated by fusing a TAL effector DNA-binding domain to a DNA cleavage domain. Restriction enzymes are enzymes that cut DNA strands at a specific sequence.
DNA polymerase adds nucleotides onto the 3'OH end of the preceding nucleotide and carries out synthesis in the 5' to 3' direction down the length of the DNA. The result of DNA polymerase function is two copies of DNA that contain one original and one newly synthesized strand of DNA.NA polymerase will use the template strands as a guide to attach the bases that are complementary on the newly synthesized strand of DNA. The nucleotides are added to the 3'OH end of the previous nucleotide.