APC YA: An In-Depth Exploration of its Significance and Purpose We weren’t able to create a summary for you. Refresh your page to try again. There are a wide variety of APC types involved in presenting β-cell antigens in the thymus, bone marrow, and peripheral lymphoid tissues, each equipped with its unique set of signals that will dictate the outcome of the T-cell response. There are a wide variety of APC types involved in presenting β-cell antigens in the thymus, bone marrow, and peripheral lymphoid tissues, each equipped with its unique set of signals that will dictate the outcome of the T-cell response. APC fees applied to academic research are usually expensive, effectively limiting open access publishing to wealthier institutions, scholars, and students. The APC model of open access, among other controversies, is part of the wider and increasingly global Open Access OA's ethics debate. APC fees applied to academic research are usually expensive, effectively limiting open access publishing to wealthier institutions, scholars, and students. The APC model of open access, among other controversies, is part of the wider and increasingly global Open Access OA's ethics debate.