RT Journal Article SR Electronic T1 The constitution and properties of two gastrins extracted from hog antral mucosa JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 103 OP 107 DO 10.1136/gut.5.2.103 VO 5 IS 2 A1 R. A. Gregory A1 Hilda J. Tracy YR 1964 UL http://gut.bmj.com/content/5/2/103.abstract AB