Erbium is used in metallurgy and in the production of colored glass and
porcelain. No essential biological role for erbium is known. In the
absence of Ca2+, Er3+ restored 78% of Bacillus
subtilis α-amylase activity (Smolka et al, 1971). Er3+ was found to
bind both Gram-positive and Gram-negative cell surfaces (Zborowski et al, 1992).
For more information:
Medline for Erbium AND bacteria