Electronic Journal of Differential Equations, Vol. 2010(2010), No. 145, pp. 1-20. Title: Transport equations in cell population dynamics II Author: Mohamed Boulanouar (Univ. de Poitiers, France) Abstract: In this work, we study the cellular profile in a cell proliferating model presented in Boulanouar [4]. Each cell is characterized by its degree of maturity and its maturation velocity. The boundary conditions generalizes the known biological rules. We study also the degenerate case corresponding to infinite maturation velocity, and describe mathematically the cellular profile. Submitted May 23, 2010. Published October 12, 2010. Math Subject Classifications: 92C37, 82D75. Key Words: Semigroups; operators; boundary value problem; cell population dynamic; general boundary condition.