确定D1细胞为人类胰多肽（HPP）的来源。

Heitz P, Polak J M, Bloom S R, Pearse A G

Gut. 1976 Oct;17(10):755-8. doi: 10.1136/gut.17.10.755.

Immunoperoxidase positive HPP-producing cells have been examined ultrastructurally using the serial semithin-thin section technique. The features of the HPP cells were found to be identical with those of the previously described D1-cell. The D1-cells are scattered throughout the exocrine parenchyma and occur to a minor extent in the islets.

利用连续半薄-超薄切片技术，对免疫过氧化物酶阳性的产生高血糖素的细胞进行了超微结构检查。发现高血糖素细胞的特征与先前描述的D1细胞相同。D1细胞散布于整个外分泌实质，在胰岛中也有少量存在。