The proposed cause of cjd and kuru in humans, mad cow disease, and scrapie in sheep is a change in a brain protein. disease victims appear to have a protein that should normally contain alpha helices but instead they have changed into a protein made of beta pleated sheets. the disease appears to spread when the abnormal protein comes into contact with the normal protein, causing it to become deformed. which level of protein structure is associated with these diseases?

Describe at least 2 abiotic and two biotic factors found in the desert biome how do these abiotic factors interact with the biotic factors

Neelaredoxin is a 15-kda protein that is a gene product common in anaerobic prokaryotes. it has superoxide-scavenging activity, and it is constitutively expressed. in addition, its expression is not further induced during its exposure to o2 or h2o2 (silva, g., et al. 2001. j. bacteriol. 183: 4413–4420). which of the following statements best describes neelaredoxin synthesis? a-neelaredoxin is produced at all times; levels are constant even when exposed to o2 or h2o2.b-neelaredoxin is produced at all times; exposure to o2 or h2o2 increases expression.c-neelaredoxin is produced at all times; exposure to o2 or h2o2 decreases or prevents expression.d-neelaredoxin is only produced when there is exposure to o2 or h2o2.

Plants that have reproductive structures called cones are?