The process that results in incorporation of a protein into an endoplasmic reticulum (ER) membrane. It depends on specific topogenic sequences of amino acids that ensure that a protein acquires the proper orientation during its insertion into the ER membrane. [ https://www.worldcat.org/search?q=bn%3A0716731363 ]
Synonyms: protein-endoplasmic reticulum insertion integral ER membrane protein positioning positioning of protein in ER membrane protein-ER insertion integral ER membrane protein localization protein insertion into endoplasmic reticulum membrane localization of protein in ER membrane