Fig. 2

Histology organ images of male control; in-house synthesized and optimized PB treated male; Female control and in-house synthesized and optimized PB-1 and PB-2 treated female in sub-acute oral toxicity study. Figure represents photomicrographs of brain (a1–a6), trachea (b1–b6), lungs (c1–c6), heart (d1–d6), spleen (e1–e6), testis (f1–f3), ovary (f4–f6), liver (g1–g6), adrenal gland (h1–h6), stomach (i1–i6), kidney (j1–j6), ileum (k1–k6), jejunum (l1–l6), duodenum (m1–m6), colon n1–n6, respectively. At 10X magnification, histologic cross sections (H&E stained) of treated groups showing comparable histological features with the control sections