In human prostatecarcinoma, high levels of nitrotyrosine in T cells due to the action ofperoxynitrite, makes them unresponsive to tumor antigen [169].Direct contact of T cells with MDSCs leads to the nitration of T cellreceptor (TCR) and CD8 molecules making them unresponsive tospeciï¬c antigen stimuli [170,171].
Abiotic factors of the rainforest include soil, water, rocks, light, and climate.The soil is typically poor in a tropical rainforest because the heavy rainfall washes away nutrients and it is usually acidic. Because of the soil conditions, many trees rely upon lateral root systems rather than deep tap roots. Views.
It may be true that interactions in the rainforest are dominated by biological entities. That stresses and disturbances are dominated by biological entities. However, there are factors that influence and allow for that biological activity to be the dominate form of stress and disturbance. These factors may be abiotic in nature. If the question is asking for factors that come from biological entities, then that is a very tough question. There are ~millions of species (still waiting to find the limit of that insect species accumulation curve) all living relatively adjacent to each other.